diff --git a/code/__DEFINES/dcs/atom_signals.dm b/code/__DEFINES/dcs/atom_signals.dm
index 30370323fb8c..574552e87d22 100644
--- a/code/__DEFINES/dcs/atom_signals.dm
+++ b/code/__DEFINES/dcs/atom_signals.dm
@@ -6,31 +6,18 @@
 
 // /atom
 
-///from base of atom/proc/Initialize(): sent any time a new atom is created
-#define COMSIG_ATOM_CREATED "atom_created"
-//from SSatoms InitAtom - Only if the  atom was not deleted or failed initialization
-#define COMSIG_ATOM_AFTER_SUCCESSFUL_INITIALIZE "atom_init_success"
 ///from base of atom/attackby(): (/obj/item, /mob/living, params)
 #define COMSIG_PARENT_ATTACKBY "atom_attackby"
 ///Return this in response if you don't want afterattack to be called
 	#define COMPONENT_NO_AFTERATTACK (1<<0)
 ///from base of atom/attack_hulk(): (/mob/living/carbon/human)
 #define COMSIG_ATOM_HULK_ATTACK "hulk_attack"
-///from base of atom/animal_attack(): (/mob/user)
-#define COMSIG_ATOM_ATTACK_ANIMAL "attack_animal"
 ///from base of atom/examine(): (examining_user, examine_list)
 #define COMSIG_PARENT_EXAMINE "atom_examine"
 ///from base of atom/examine_more(): (examining_user, examine_list)
 #define COMSIG_PARENT_EXAMINE_MORE "atom_examine_more"
-///from base of atom/get_examine_name(): (/mob, list/overrides)
-#define COMSIG_ATOM_GET_EXAMINE_NAME "atom_examine_name"
-	//Positions for overrides list
-	#define EXAMINE_POSITION_ARTICLE (1<<0)
-	#define EXAMINE_POSITION_BEFORE (1<<1)
-	//End positions
-	#define COMPONENT_EXNAME_CHANGED (1<<0)
-	///from base of [/atom/proc/update_appearance]: (updates)
-	#define COMSIG_ATOM_UPDATE_APPEARANCE "atom_update_appearance"
+///from base of [/atom/proc/update_appearance]: (updates)
+#define COMSIG_ATOM_UPDATE_APPEARANCE "atom_update_appearance"
 	/// If returned from [COMSIG_ATOM_UPDATE_APPEARANCE] it prevents the atom from updating its name.
 	#define COMSIG_ATOM_NO_UPDATE_NAME UPDATE_NAME
 	/// If returned from [COMSIG_ATOM_UPDATE_APPEARANCE] it prevents the atom from updating its desc.
@@ -60,8 +47,6 @@
 	#define COMPONENT_ATOM_BLOCK_EXIT (1<<0)
 ///from base of atom/Exited(): (atom/movable/exiting, atom/newloc)
 #define COMSIG_ATOM_EXITED "atom_exited"
-///from base of atom/Bumped(): (/atom/movable)
-#define COMSIG_ATOM_BUMPED "atom_bumped"
 ///from base of atom/ex_act(): (severity, target)
 #define COMSIG_ATOM_EX_ACT "atom_ex_act"
 ///from base of atom/emp_act(): (severity)
@@ -78,21 +63,12 @@
 #define COMSIG_ATOM_EMAG_ACT "atom_emag_act"
 ///from base of atom/rad_act(intensity)
 #define COMSIG_ATOM_RAD_ACT "atom_rad_act"
-///from base of atom/narsie_act(): ()
-#define COMSIG_ATOM_NARSIE_ACT "atom_narsie_act"
-///from base of atom/rcd_act(): (/mob, /obj/item/construction/rcd, passed_mode)
-#define COMSIG_ATOM_RCD_ACT "atom_rcd_act"
 ///from base of atom/singularity_pull(): (S, current_size)
 #define COMSIG_ATOM_SING_PULL "atom_sing_pull"
-///from obj/machinery/bsa/full/proc/fire(): ()
-#define COMSIG_ATOM_BSA_BEAM "atom_bsa_beam_pass"
-	#define COMSIG_ATOM_BLOCKS_BSA_BEAM (1<<0)
 ///from base of atom/set_light(): (l_range, l_power, l_color)
 #define COMSIG_ATOM_SET_LIGHT "atom_set_light"
 ///from base of atom/setDir(): (old_dir, new_dir)
 #define COMSIG_ATOM_DIR_CHANGE "atom_dir_change"
-///from base of atom/handle_atom_del(): (atom/deleted)
-#define COMSIG_ATOM_CONTENTS_DEL "atom_contents_del"
 ///from base of atom/has_gravity(): (turf/location, list/forced_gravities)
 #define COMSIG_ATOM_HAS_GRAVITY "atom_has_gravity"
 ///from proc/get_rad_contents(): ()
@@ -104,26 +80,6 @@
 ///from base of datum/radiation_wave/check_obstructions(): (datum/radiation_wave, width)
 #define COMSIG_ATOM_RAD_WAVE_PASSING "atom_rad_wave_pass"
 	#define COMPONENT_RAD_WAVE_HANDLED (1<<0)
-///from base of atom/screwdriver_act(): (mob/living/user, obj/item/I)
-#define COMSIG_ATOM_SCREWDRIVER_ACT "atom_screwdriver_act"
-///from base of atom/wrench_act(): (mob/living/user, obj/item/I)
-#define COMSIG_ATOM_WRENCH_ACT "atom_wrench_act"
-///from base of atom/multitool_act(): (mob/living/user, obj/item/I)
-#define COMSIG_ATOM_MULTITOOL_ACT "atom_multitool_act"
-///from base of atom/welder_act(): (mob/living/user, obj/item/I)
-#define COMSIG_ATOM_WELDER_ACT "atom_welder_act"
-///from base of atom/wirecutter_act(): (mob/living/user, obj/item/I)
-#define COMSIG_ATOM_WIRECUTTER_ACT "atom_wirecutter_act"
-///from base of atom/crowbar_act(): (mob/living/user, obj/item/I)
-#define COMSIG_ATOM_CROWBAR_ACT "atom_crowbar_act"
-///from base of atom/analyser_act(): (mob/living/user, obj/item/I)
-#define COMSIG_ATOM_ANALYSER_ACT "atom_analyser_act"
-	#define COMPONENT_BLOCK_TOOL_ATTACK (1<<0)
-///called when teleporting into a protected turf: (channel, turf/origin)
-#define COMSIG_ATOM_INTERCEPT_TELEPORT "intercept_teleport"
-	#define COMPONENT_BLOCK_TELEPORT (1<<0)
-///called when an atom is added to the hearers on get_hearers_in_view(): (list/processing_list, list/hearers)
-#define COMSIG_ATOM_HEARER_IN_VIEW "atom_hearer_in_view"
 ///called when an atom starts orbiting another atom: (atom)
 #define COMSIG_ATOM_ORBIT_BEGIN "atom_orbit_begin"
 ///called when an atom stops orbiting another atom: (atom)
@@ -158,12 +114,6 @@
 	#define COMPONENT_NO_ATTACK_HAND (1<<0)								//works on all 3.
 //This signal return value bitflags can be found in __DEFINES/misc.dm
 
-///called for each movable in a turf contents on /turf/zImpact(): (atom/movable/A, levels)
-#define COMSIG_ATOM_INTERCEPT_Z_FALL "movable_intercept_z_impact"
-///called on a movable (NOT living) when someone starts pulling it (atom/movable/puller, state, force)
-#define COMSIG_ATOM_START_PULL "movable_start_pull"
-///called on /living when someone starts pulling it (atom/movable/puller, state, force)
-#define COMSIG_LIVING_START_PULL "living_start_pull"
 ///called on /living, when pull is attempted, but before it completes, from base of [/mob/living/start_pulling]: (atom/movable/thing, force)
 #define COMSIG_LIVING_TRY_PULL "living_try_pull"
 	#define COMSIG_LIVING_CANCEL_PULL (1 << 0)
diff --git a/code/__DEFINES/dcs/basetype_signals.dm b/code/__DEFINES/dcs/basetype_signals.dm
index b4efddc99f4f..6a5230caa465 100644
--- a/code/__DEFINES/dcs/basetype_signals.dm
+++ b/code/__DEFINES/dcs/basetype_signals.dm
@@ -16,11 +16,6 @@
 /// from base of client/MouseUp(): (/client, object, location, control, params)
 #define COMSIG_CLIENT_MOUSEDRAG "client_mousedrag"
 
-/// from base of area/Entered(): (/area)
-#define COMSIG_ENTER_AREA "enter_area"
-/// from base of area/Exited(): (/area)
-#define COMSIG_EXIT_AREA "exit_area"
-
 // /area
 
 /// from base of area/Entered(): (atom/movable/M)
@@ -32,10 +27,3 @@
 
 ///from base of turf/ChangeTurf(): (path, list/new_baseturfs, flags, list/transferring_comps)
 #define COMSIG_TURF_CHANGE "turf_change"
-///from base of atom/has_gravity(): (atom/asker, list/forced_gravities)
-#define COMSIG_TURF_HAS_GRAVITY "turf_has_gravity"
-///from base of turf/New(): (turf/source, direction)
-#define COMSIG_TURF_MULTIZ_NEW "turf_multiz_new"
-///from base of /turf/proc/levelupdate(). (intact) true to hide and false to unhide
-#define COMSIG_OBJ_HIDE	"obj_hide"
-
diff --git a/code/__DEFINES/dcs/carbon_signals.dm b/code/__DEFINES/dcs/carbon_signals.dm
index 89af8e88b5b2..289d2d0e6241 100644
--- a/code/__DEFINES/dcs/carbon_signals.dm
+++ b/code/__DEFINES/dcs/carbon_signals.dm
@@ -4,20 +4,10 @@
  * All signals send the source datum of the signal as the first argument
  */
 
-///from base of mob/living/carbon/soundbang_act(): (list(intensity))
-#define COMSIG_CARBON_SOUNDBANG "carbon_soundbang"
 ///from /item/organ/proc/Insert() (/obj/item/organ/)
 #define COMSIG_CARBON_GAIN_ORGAN "carbon_gain_organ"
 ///from /item/organ/proc/Remove() (/obj/item/organ/)
 #define COMSIG_CARBON_LOSE_ORGAN "carbon_lose_organ"
-///from /mob/living/carbon/doUnEquip(obj/item/I, force, newloc, no_move, invdrop, silent)
-#define COMSIG_CARBON_EQUIP_HAT "carbon_equip_hat"
-///from /mob/living/carbon/doUnEquip(obj/item/I, force, newloc, no_move, invdrop, silent)
-#define COMSIG_CARBON_UNEQUIP_HAT "carbon_unequip_hat"
-///defined twice, in carbon and human's topics, fired when interacting with a valid embedded_object to pull it out (mob/living/carbon/target, /obj/item, /obj/item/bodypart/L)
-#define COMSIG_CARBON_EMBED_RIP "item_embed_start_rip"
-///called when removing a given item from a mob, from mob/living/carbon/remove_embedded_object(mob/living/carbon/target, /obj/item)
-#define COMSIG_CARBON_EMBED_REMOVAL "item_embed_remove_safe"
 /// From /mob/living/carbon/swap_hand(): Called when the user swaps their active hand
 #define COMSIG_CARBON_SWAP_HANDS "carbon_swap_hands"
 /// From /mob/living/carbon/toggle_throw_mode()
@@ -38,16 +28,10 @@
 #define COMSIG_CARBON_STAMINA_REGENERATED "carbon_stamina_regenerated"
 
 
-///from mob/living/carbon/human/UnarmedAttack(): (atom/target, proximity)
-#define COMSIG_HUMAN_EARLY_UNARMED_ATTACK "human_early_unarmed_attack"
 ///from mob/living/carbon/human/UnarmedAttack(): (atom/target, proximity)
 #define COMSIG_HUMAN_MELEE_UNARMED_ATTACK "human_melee_unarmed_attack"
 ///from mob/living/carbon/human/UnarmedAttack(): (mob/living/carbon/human/attacker)
 #define COMSIG_HUMAN_MELEE_UNARMED_ATTACKBY "human_melee_unarmed_attackby"
-///Hit by successful disarm attack (mob/living/carbon/human/attacker,zone_targeted)
-#define COMSIG_HUMAN_DISARM_HIT	"human_disarm_hit"
-///Whenever EquipRanked is called, called after job is set
-#define COMSIG_JOB_RECEIVED "job_received"
 // called after DNA is updated
 #define COMSIG_HUMAN_UPDATE_DNA "human_update_dna"
 /// From mob/living/carbon/human/change_body_accessory(): (mob/living/carbon/human/H, body_accessory_style)
diff --git a/code/__DEFINES/dcs/datum_signals.dm b/code/__DEFINES/dcs/datum_signals.dm
index b84db8dded7e..650c91a12e30 100644
--- a/code/__DEFINES/dcs/datum_signals.dm
+++ b/code/__DEFINES/dcs/datum_signals.dm
@@ -14,8 +14,6 @@
 #define COMSIG_PARENT_PREQDELETED "parent_preqdeleted"
 /// just before a datum's Destroy() is called: (force), at this point none of the other components chose to interrupt qdel and Destroy will be called
 #define COMSIG_PARENT_QDELETING "parent_qdeleting"
-/// generic topic handler (usr, href_list)
-#define COMSIG_TOPIC "handle_topic"
 
 /// fires on the target datum when an element is attached to it (/datum/element)
 #define COMSIG_ELEMENT_ATTACH "element_attach"
@@ -37,12 +35,6 @@
 	/// If returned from this signal, will prevent any surgery splashing.
 	#define COMPONENT_BLOOD_SPLASH_HANDLED (1<<0)
 
-// Sent from a surgery step when organs are being spread from an incision
-#define COMSIG_SURGERY_GERM_SPREAD "surgery_germ_spread"
-	/// If returned from this signal, germ spread will be blocked.
-	#define COMPONENT_GERM_SPREAD_BLOCK (1<<0)
-
-
 // /datum/species
 
 ///from datum/species/on_species_gain(): (datum/species/new_species, datum/species/old_species)
@@ -63,10 +55,6 @@
 
 // /datum/component/decal
 
-///(): Returns bitflags of wet values.
-#define COMSIG_TURF_IS_WET "check_turf_wet"
-///(max_strength, immediate, duration_decrease = INFINITY): Returns bool.
-#define COMSIG_TURF_MAKE_DRY "make_turf_try"
 ///called on an object to clean it of cleanables. Usualy with soap: (num/strength)
 #define COMSIG_COMPONENT_CLEAN_ACT "clean_act"
 
@@ -126,16 +114,9 @@
 
 // other subtypes
 
-/// called by datum/cinematic/play() : (datum/cinematic/new_cinematic)
-#define COMSIG_GLOB_PLAY_CINEMATIC "!play_cinematic"
-	#define COMPONENT_GLOB_BLOCK_CINEMATIC (1<<0)
-
 ///from base of /datum/local_powernet/proc/power_change()
 #define COMSIG_POWERNET_POWER_CHANGE "powernet_power_change"
 
 /// Sent when bodies transfer between shades/shards and constructs
 /// from base of /datum/component/construct_held_body/proc/transfer_held_body()
 #define COMSIG_SHADE_TO_CONSTRUCT_TRANSFER "shade_to_construct_transfer"
-
-///called when you wash your face at a sink: (num/strength)
-#define COMSIG_COMPONENT_CLEAN_FACE_ACT "clean_face_act"
diff --git a/code/__DEFINES/dcs/dcs_flags.dm b/code/__DEFINES/dcs/dcs_flags.dm
index 3c238acc0074..868edb475c1e 100644
--- a/code/__DEFINES/dcs/dcs_flags.dm
+++ b/code/__DEFINES/dcs/dcs_flags.dm
@@ -29,13 +29,6 @@
 /// each component of the same type is consulted as to whether the duplicate should be allowed
 #define COMPONENT_DUPE_SELECTIVE		5
 
-//Redirection component init flags
-#define REDIRECT_TRANSFER_WITH_TURF 1
-
-//Arch
-#define ARCH_PROB "probability"					//Probability for each item
-#define ARCH_MAXDROP "max_drop_amount"				//each item's max drop amount
-
 //Ouch my toes!
 #define CALTROP_BYPASS_SHOES 1
 #define CALTROP_IGNORE_WALKERS 2
diff --git a/code/__DEFINES/dcs/global_signals.dm b/code/__DEFINES/dcs/global_signals.dm
index 28a149d5412c..350f1603e968 100644
--- a/code/__DEFINES/dcs/global_signals.dm
+++ b/code/__DEFINES/dcs/global_signals.dm
@@ -12,19 +12,12 @@
 #define COMSIG_GLOB_EXPLOSION "!explosion"
 /// job subsystem has spawned and equipped a new mob
 #define COMSIG_GLOB_JOB_AFTER_SPAWN "!job_after_spawn"
-///from SSsun when the sun changes position : (azimuth)
-#define COMSIG_SUN_MOVED "sun_moved"
 ///from SSsecurity_level on planning security level change : (previous_level_number, new_level_number)
 #define COMSIG_SECURITY_LEVEL_CHANGE_PLANNED "security_level_change_planned"
 ///from SSsecurity_level when the security level changes : (previous_level_number, new_level_number)
 #define COMSIG_SECURITY_LEVEL_CHANGED "security_level_changed"
-
-/// mob was created somewhere : (mob)
-#define COMSIG_GLOB_MOB_CREATED "!mob_created"
-/// mob died somewhere : (mob , gibbed)
-#define COMSIG_GLOB_MOB_DEATH "!mob_death"
-/// global living say plug - use sparingly: (mob/speaker , message)
-#define COMSIG_GLOB_LIVING_SAY_SPECIAL "!say_special"
+/// cable was placed or joined somewhere : (turf)
+#define COMSIG_GLOB_CABLE_UPDATED "!cable_updated"
 
 /// Called when the round has started, but before GAME_STATE_PLAYING.
 #define COMSIG_TICKER_ROUND_STARTING "comsig_ticker_round_starting"
diff --git a/code/__DEFINES/dcs/item_signals.dm b/code/__DEFINES/dcs/item_signals.dm
index f90529d6e968..1372ce4200a8 100644
--- a/code/__DEFINES/dcs/item_signals.dm
+++ b/code/__DEFINES/dcs/item_signals.dm
@@ -21,73 +21,33 @@
 #define COMSIG_ITEM_BEING_ATTACKED "item_being_attacked"
 ///from base of obj/item/afterattack(): (atom/target, mob/user, params)
 #define COMSIG_ITEM_AFTERATTACK "item_afterattack"
-///from base of obj/item/attack_qdeleted(): (atom/target, mob/user, params)
-#define COMSIG_ITEM_ATTACK_QDELETED "item_attack_qdeleted"
-///from base of obj/item/equipped(): (/mob/equipper, slot)
 ///called on [/obj/item] before unequip from base of [mob/proc/doUnEquip]: (force, atom/newloc, no_move, invdrop, silent)
 #define COMSIG_ITEM_PRE_UNEQUIP "item_pre_unequip"
 	///only the pre unequip can be cancelled
 	#define COMPONENT_ITEM_BLOCK_UNEQUIP (1<<0)
+///from base of obj/item/equipped(): (/mob/equipper, slot)
 #define COMSIG_ITEM_EQUIPPED "item_equip"
 ///from base of obj/item/dropped(): (mob/user)
 #define COMSIG_ITEM_DROPPED "item_drop"
 ///from base of obj/item/pickup(): (/mob/taker)
 #define COMSIG_ITEM_PICKUP "item_pickup"
-///from base of mob/living/carbon/attacked_by(): (mob/living/carbon/target, mob/living/user, hit_zone)
-#define COMSIG_ITEM_ATTACK_ZONE "item_attack_zone"
-///return a truthy value to prevent ensouling, checked in /datum/spell/lichdom/cast(): (mob/user)
-#define COMSIG_ITEM_IMBUE_SOUL "item_imbue_soul"
-///called before marking an object for retrieval, checked in /datum/spell/summonitem/cast() : (mob/user)
-#define COMSIG_ITEM_MARK_RETRIEVAL "item_mark_retrieval"
-	#define COMPONENT_BLOCK_MARK_RETRIEVAL (1<<0)
 ///from base of obj/item/hit_reaction(): (list/args)
 #define COMSIG_ITEM_HIT_REACT "item_hit_react"
 	#define COMPONENT_BLOCK_SUCCESSFUL (1 << 0)
 	#define COMPONENT_BLOCK_PERFECT (1 << 2)
-///called on item when crossed by something (): (/atom/movable, mob/living/crossed)
-#define COMSIG_ITEM_WEARERCROSSED "wearer_crossed"
-///called on item when microwaved (): (obj/machinery/microwave/M)
-#define COMSIG_ITEM_MICROWAVE_ACT "microwave_act"
 ///from base of item/sharpener/attackby(): (amount, max)
 #define COMSIG_ITEM_SHARPEN_ACT "sharpen_act"
 	#define COMPONENT_SHARPEN_APPLIED (1<<0)
 	#define COMPONENT_BLOCK_SHARPEN_BLOCKED (1<<1)
 	#define COMPONENT_BLOCK_SHARPEN_ALREADY (1<<2)
 	#define COMPONENT_BLOCK_SHARPEN_MAXED (1<<3)
-///from base of [/obj/item/proc/tool_check_callback]: (mob/living/user)
-#define COMSIG_TOOL_IN_USE "tool_in_use"
-///from base of [/obj/item/proc/tool_start_check]: (mob/living/user)
-#define COMSIG_TOOL_START_USE "tool_start_use"
 ///from base of [/obj/item/proc/tool_attack_chain]: (atom/tool, mob/user)
 #define COMSIG_TOOL_ATTACK "tool_attack"
 	#define COMPONENT_CANCEL_TOOLACT (1<<0)
-///from [/obj/item/proc/disableEmbedding]:
-#define COMSIG_ITEM_DISABLE_EMBED "item_disable_embed"
-///from [/obj/effect/mine/proc/triggermine]:
-#define COMSIG_MINE_TRIGGERED "minegoboom"
-/// Called by /obj/item/proc/worn_overlays(list/overlays, mutable_appearance/standing, isinhands, icon_file)
-#define COMSIG_ITEM_GET_WORN_OVERLAYS "item_get_worn_overlays"
 /// Called by /obj/item/assembly/signaler(called_from_radio)
 #define COMSIG_ASSEMBLY_PULSED "item_assembly_pulsed"
-
-///called when an item is sold by the exports subsystem
-#define COMSIG_ITEM_SOLD "item_sold"
-///called when a wrapped up structure is opened by hand
-#define COMSIG_STRUCTURE_UNWRAPPED "structure_unwrapped"
-#define COMSIG_ITEM_UNWRAPPED "item_unwrapped"
-///called when a wrapped up item is opened by hand
-	#define COMSIG_ITEM_SPLIT_VALUE  (1<<0)
-///called when getting the item's exact ratio for cargo's profit.
-#define COMSIG_ITEM_SPLIT_PROFIT "item_split_profits"
-///called when getting the item's exact ratio for cargo's profit, without selling the item.
-#define COMSIG_ITEM_SPLIT_PROFIT_DRY "item_split_profits_dry"
-
-// /obj/item/clothing
-
 ///from [/mob/living/carbon/human/Move]: ()
 #define COMSIG_SHOES_STEP_ACTION "shoes_step_action"
-///from base of /obj/item/clothing/suit/space/proc/toggle_spacesuit(): (obj/item/clothing/suit/space/suit)
-#define COMSIG_SUIT_SPACE_TOGGLE "suit_space_toggle"
 
 // /obj/item/implant
 
@@ -112,27 +72,6 @@
 #define COMSIG_IMPLANT_REMOVED "implant_removed"
 
 
-// /obj/item/pda
-
-///called on pda when the user changes the ringtone: (mob/living/user, new_ringtone)
-#define COMSIG_PDA_CHANGE_RINGTONE "pda_change_ringtone"
-	#define COMPONENT_STOP_RINGTONE_CHANGE (1<<0)
-#define COMSIG_PDA_CHECK_DETONATE "pda_check_detonate"
-	#define COMPONENT_PDA_NO_DETONATE (1<<0)
-
-
-// /obj/item/radio
-
-///called from base of /obj/item/radio/proc/set_frequency(): (list/args)
-#define COMSIG_RADIO_NEW_FREQUENCY "radio_new_frequency"
-
-
-// /obj/item/pen
-
-///called after rotation in /obj/item/pen/attack_self(): (rotation, mob/living/carbon/user)
-#define COMSIG_PEN_ROTATED "pen_rotated"
-
-
 // /obj/item/gun
 
 ///called in /obj/item/gun/fire_gun (user, target, flag, params)
@@ -150,14 +89,6 @@
 	#define COMPONENT_AUTOFIRE_SHOT_SUCCESS (1<<0)
 
 
-// /obj/item/grenade
-
-///called in /obj/item/gun/process_fire (user, target, params, zone_override)
-#define COMSIG_GRENADE_PRIME "grenade_prime"
-///called in /obj/item/gun/process_fire (user, target, params, zone_override)
-#define COMSIG_GRENADE_ARMED "grenade_armed"
-
-
 // /obj/item/mod
 
 /// Called when a module is selected to be the active one from on_select(obj/item/mod/module/module)
@@ -196,10 +127,7 @@
 #define COMSIG_MOD_WEARER_UNSET "mod_wearer_unset"
 
 
-// /obj/item/food
-
-///from base of obj/item/food/attack(): (mob/living/eater, mob/feeder)
-#define COMSIG_FOOD_EATEN "food_eaten"
+// other items
 
 /// from base of /obj/item/slimepotion/speed/afterattack(): (obj/target, /obj/src, mob/user)
 #define COMSIG_SPEED_POTION_APPLIED "speed_potion"
diff --git a/code/__DEFINES/dcs/machinery_signals.dm b/code/__DEFINES/dcs/machinery_signals.dm
index 1b368ab614c6..051b36a040d0 100644
--- a/code/__DEFINES/dcs/machinery_signals.dm
+++ b/code/__DEFINES/dcs/machinery_signals.dm
@@ -4,31 +4,28 @@
  * All signals send the source datum of the signal as the first argument
  */
 
-///from /obj/machinery/obj_break(damage_flag): (damage_flag)
-#define COMSIG_MACHINERY_BROKEN "machinery_broken"
-///from base power_change() when power is lost
-#define COMSIG_MACHINERY_POWER_LOST "machinery_power_lost"
-///from base power_change() when power is restored
-#define COMSIG_MACHINERY_POWER_RESTORED "machinery_power_restored"
-
 
 // /obj/machinery/camera
 
+/// called on cameras after activation: (mob/user, display_message)
 #define COMSIG_CAMERA_ON "camera_on"
+/// called on cameras after deactivation: (mob/user, display_message, emped)
 #define COMSIG_CAMERA_OFF "camera_off"
+/// called on cameras when moved, such as ones inside helmets: (turf/prev_turf)
 #define COMSIG_CAMERA_MOVED "camera_moved"
 
 
 // /obj/machinery/door
 
+/// called on doors when opened: ()
 #define COMSIG_DOOR_OPEN "door_open"
+/// called on doors when closed: ()
 #define COMSIG_DOOR_CLOSE "door_close"
 
 
 // /obj/machinery/door/airlock
 
+/// called on airlocks when opened: ()
 #define COMSIG_AIRLOCK_OPEN "airlock_open"
+/// called on airlocks when closed: ()
 #define COMSIG_AIRLOCK_CLOSE "airlock_close"
-
-/// ingame button pressed (/obj/machinery/button/button)
-#define COMSIG_GLOB_BUTTON_PRESSED "!button_pressed"
diff --git a/code/__DEFINES/dcs/mob_signals.dm b/code/__DEFINES/dcs/mob_signals.dm
index 406d4541a286..5ff291666809 100644
--- a/code/__DEFINES/dcs/mob_signals.dm
+++ b/code/__DEFINES/dcs/mob_signals.dm
@@ -38,8 +38,6 @@
 #define COMSIG_MOB_APPLY_DAMAGE	"mob_apply_damage"
 ///from base of obj/item/afterattack(): (atom/target, mob/user, proximity_flag, click_parameters)
 #define COMSIG_MOB_ITEM_AFTERATTACK "mob_item_afterattack"
-///from base of obj/item/attack_qdeleted(): (atom/target, mob/user, proxiumity_flag, click_parameters)
-#define COMSIG_MOB_ITEM_ATTACK_QDELETED "mob_item_attack_qdeleted"
 ///from base of mob/RangedAttack(): (atom/A, params)
 #define COMSIG_MOB_ATTACK_RANGED "mob_attack_ranged"
 ///from base of /mob/throw_item(): (atom/target)
@@ -202,4 +200,7 @@
 /// from observer_base/do_observe(): (mob/no_longer_following)
 #define COMSIG_GHOST_STOP_OBSERVING "ghost_stop_observing"
 
+// other signals
+
+/// called when a living mob's stun status is cleared: ()
 #define COMSIG_LIVING_CLEAR_STUNS "living_clear_stuns"
diff --git a/code/__DEFINES/dcs/movable_signals.dm b/code/__DEFINES/dcs/movable_signals.dm
index af529e08601c..2d197e1d0dd4 100644
--- a/code/__DEFINES/dcs/movable_signals.dm
+++ b/code/__DEFINES/dcs/movable_signals.dm
@@ -4,9 +4,6 @@
  * All signals send the source datum of the signal as the first argument
  */
 
-///from base of atom/movable/Moved(): (/atom)
-#define COMSIG_MOVABLE_PRE_MOVE "movable_pre_move"
-	#define COMPONENT_MOVABLE_BLOCK_PRE_MOVE (1<<0)
 ///from base of atom/movable/Moved(): (/atom, dir)
 #define COMSIG_MOVABLE_MOVED "movable_moved"
 ///from base of atom/movable/Cross(): (/atom/movable)
@@ -38,22 +35,12 @@
 ///from /obj/vehicle/proc/driver_move, caught by the riding component to check and execute the driver trying to drive the vehicle
 #define COMSIG_RIDDEN_DRIVER_MOVE "driver_move"
 	#define COMPONENT_DRIVER_BLOCK_MOVE (1<<0)
-///from base of atom/movable/throw_at(): (list/args)
-#define COMSIG_MOVABLE_PRE_THROW "movable_pre_throw"
-	#define COMPONENT_CANCEL_THROW (1<<0)
 ///from base of atom/movable/throw_at(): (datum/thrownthing, spin)
 #define COMSIG_MOVABLE_POST_THROW "movable_post_throw"
 ///from base of datum/thrownthing/finalize(): (obj/thrown_object, datum/thrownthing) used for when a throw is finished
 #define COMSIG_MOVABLE_THROW_LANDED "movable_throw_landed"
 ///from base of atom/movable/onTransitZ(): (old_z, new_z)
 #define COMSIG_MOVABLE_Z_CHANGED "movable_ztransit"
-///called when the movable is placed in an unaccessible area, used for stationloving: ()
-#define COMSIG_MOVABLE_SECLUDED_LOCATION "movable_secluded"
-///from base of atom/movable/Hear(): (proc args list(message, atom/movable/speaker, message_language, raw_message, radio_freq, list/spans, message_mode))
-#define COMSIG_MOVABLE_HEAR "movable_hear"
-	#define HEARING_MESSAGE 1
-	#define HEARING_SPEAKER 2
-	#define HEARING_RAW_MESSAGE 4
 
 /// Called just before something gets untilted
 #define COMSIG_MOVABLE_TRY_UNTILT "movable_try_untilt"
diff --git a/code/__DEFINES/dcs/obj_signals.dm b/code/__DEFINES/dcs/obj_signals.dm
index d002a32fe188..1cee071550ef 100644
--- a/code/__DEFINES/dcs/obj_signals.dm
+++ b/code/__DEFINES/dcs/obj_signals.dm
@@ -8,41 +8,6 @@
 
 ///from base of obj/deconstruct(): (disassembled)
 #define COMSIG_OBJ_DECONSTRUCT "obj_deconstruct"
-///called in /obj/structure/setAnchored(): (value)
-#define COMSIG_OBJ_SETANCHORED "obj_setanchored"
-///from base of code/game/machinery
-#define COMSIG_OBJ_DEFAULT_UNFASTEN_WRENCH "obj_default_unfasten_wrench"
-///called in /obj/update_icon()
-#define COMSIG_OBJ_UPDATE_ICON "obj_update_icon"
-
-
-// /obj/projectile (sent to the firer)
-
-///from base of /obj/projectile/proc/on_hit(): (atom/movable/firer, atom/target, Angle)
-#define COMSIG_PROJECTILE_SELF_ON_HIT "projectile_self_on_hit"
-///from base of /obj/projectile/proc/on_hit(): (atom/movable/firer, atom/target, Angle)
-#define COMSIG_PROJECTILE_ON_HIT "projectile_on_hit"
-///from base of /obj/projectile/proc/fire(): (obj/projectile, atom/original_target)
-#define COMSIG_PROJECTILE_BEFORE_FIRE "projectile_before_fire"
-///from the base of /obj/projectile/proc/fire(): ()
-#define COMSIG_PROJECTILE_FIRE "projectile_fire"
-///sent to targets during the process_hit proc of projectiles
-#define COMSIG_PROJECTILE_PREHIT "com_proj_prehit"
-///sent to targets during the process_hit proc of projectiles
-#define COMSIG_PROJECTILE_RANGE_OUT "projectile_range_out"
-///sent when trying to force an embed (mainly for projectiles, only used in the embed element)
-#define COMSIG_EMBED_TRY_FORCE "item_try_embed"
-///sent to targets during the process_hit proc of projectiles
-#define COMSIG_PELLET_CLOUD_INIT "pellet_cloud_init"
-
-
-// /obj/mecha
-
-///sent from mecha action buttons to the mecha they're linked to
-#define COMSIG_MECHA_ACTION_ACTIVATE "mecha_action_activate"
-
-/// cable was placed or joined somewhere : (turf)
-#define COMSIG_GLOB_CABLE_UPDATED "!cable_updated"
 
 
 // /obj/structure/cursed_slot_machine
@@ -55,9 +20,3 @@
 #define COMSIG_CURSED_SLOT_MACHINE_LOST "cursed_slot_machine_lost"
 /// from /obj/structure/cursed_slot_machine/determine_victor() when someone finally wins.
 #define COMSIG_GLOB_CURSED_SLOT_MACHINE_WON "cursed_slot_machine_won"
-
-
-// other subtypes
-
-///from base of /obj/effect/decal/cleanable/blood/gibs/streak(): (list/directions, list/diseases)
-#define COMSIG_GIBS_STREAK "gibs_streak"