diff --git a/code/ATMOSPHERICS/components/omni_devices/filter.dm b/code/ATMOSPHERICS/components/omni_devices/filter.dm
index feb1b5cb93..8710623dfd 100644
--- a/code/ATMOSPHERICS/components/omni_devices/filter.dm
+++ b/code/ATMOSPHERICS/components/omni_devices/filter.dm
@@ -1,11 +1,11 @@
 //--------------------------------------------
 // Gas filter - omni variant
 //--------------------------------------------
-/obj/machinery/atmospherics/omni/filter
+/obj/machinery/atmospherics/omni/atmos_filter
 	name = "omni gas filter"
 	icon_state = "map_filter"
 
-	var/list/filters = new()
+	var/list/atmos_filters = new()
 	var/datum/omni_port/input
 	var/datum/omni_port/output
 
@@ -18,27 +18,27 @@
 
 	var/list/filtering_outputs = list()	//maps gasids to gas_mixtures
 
-/obj/machinery/atmospherics/omni/filter/New()
+/obj/machinery/atmospherics/omni/atmos_filter/New()
 	..()
 	rebuild_filtering_list()
 	for(var/datum/omni_port/P in ports)
 		P.air.volume = ATMOS_DEFAULT_VOLUME_FILTER
 
-/obj/machinery/atmospherics/omni/filter/Destroy()
+/obj/machinery/atmospherics/omni/atmos_filter/Destroy()
 	input = null
 	output = null
-	filters.Cut()
+	atmos_filters.Cut()
 	return ..()
 
-/obj/machinery/atmospherics/omni/filter/sort_ports()
+/obj/machinery/atmospherics/omni/atmos_filter/sort_ports()
 	for(var/datum/omni_port/P in ports)
 		if(P.update)
 			if(output == P)
 				output = null
 			if(input == P)
 				input = null
-			if(filters.Find(P))
-				filters -= P
+			if(atmos_filters.Find(P))
+				atmos_filters -= P
 
 			P.air.volume = 200
 			switch(P.mode)
@@ -47,17 +47,17 @@
 				if(ATM_OUTPUT)
 					output = P
 				if(ATM_O2 to ATM_N2O)
-					filters += P
+					atmos_filters += P
 
-/obj/machinery/atmospherics/omni/filter/error_check()
-	if(!input || !output || !filters)
+/obj/machinery/atmospherics/omni/atmos_filter/error_check()
+	if(!input || !output || !atmos_filters)
 		return 1
-	if(filters.len < 1) //requires at least 1 filter ~otherwise why are you using a filter?
+	if(atmos_filters.len < 1) //requires at least 1 atmos_filter ~otherwise why are you using a filter?
 		return 1
 
 	return 0
 
-/obj/machinery/atmospherics/omni/filter/process()
+/obj/machinery/atmospherics/omni/atmos_filter/process()
 	if(!..())
 		return 0
 
@@ -79,13 +79,13 @@
 			input.network.update = 1
 		if(output.network)
 			output.network.update = 1
-		for(var/datum/omni_port/P in filters)
+		for(var/datum/omni_port/P in atmos_filters)
 			if(P.network)
 				P.network.update = 1
 
 	return 1
 
-/obj/machinery/atmospherics/omni/filter/ui_interact(mob/user, ui_key = "main", var/datum/nanoui/ui = null, var/force_open = 1)
+/obj/machinery/atmospherics/omni/atmos_filter/ui_interact(mob/user, ui_key = "main", var/datum/nanoui/ui = null, var/force_open = 1)
 	usr.set_machine(src)
 
 	var/list/data = new()
@@ -100,7 +100,7 @@
 
 		ui.open()
 
-/obj/machinery/atmospherics/omni/filter/proc/build_uidata()
+/obj/machinery/atmospherics/omni/atmos_filter/proc/build_uidata()
 	var/list/data = new()
 
 	data["power"] = use_power
@@ -113,22 +113,22 @@
 
 		var/input = 0
 		var/output = 0
-		var/filter = 1
+		var/atmo_filter = 1
 		var/f_type = null
 		switch(P.mode)
 			if(ATM_INPUT)
 				input = 1
-				filter = 0
+				atmo_filter = 0
 			if(ATM_OUTPUT)
 				output = 1
-				filter = 0
+				atmo_filter = 0
 			if(ATM_O2 to ATM_N2O)
 				f_type = mode_send_switch(P.mode)
 
 		portData[++portData.len] = list("dir" = dir_name(P.dir, capitalize = 1), \
 										"input" = input, \
 										"output" = output, \
-										"filter" = filter, \
+										"atmo_filter" = atmo_filter, \
 										"f_type" = f_type)
 
 	if(portData.len)
@@ -139,7 +139,7 @@
 
 	return data
 
-/obj/machinery/atmospherics/omni/filter/proc/mode_send_switch(var/mode = ATM_NONE)
+/obj/machinery/atmospherics/omni/atmos_filter/proc/mode_send_switch(var/mode = ATM_NONE)
 	switch(mode)
 		if(ATM_O2)
 			return "Oxygen"
@@ -154,7 +154,7 @@
 		else
 			return null
 
-/obj/machinery/atmospherics/omni/filter/Topic(href, href_list)
+/obj/machinery/atmospherics/omni/atmos_filter/Topic(href, href_list)
 	if(..()) return 1
 	switch(href_list["command"])
 		if("power")
@@ -183,7 +183,7 @@
 	nanomanager.update_uis(src)
 	return
 
-/obj/machinery/atmospherics/omni/filter/proc/mode_return_switch(var/mode)
+/obj/machinery/atmospherics/omni/atmos_filter/proc/mode_return_switch(var/mode)
 	switch(mode)
 		if("Oxygen")
 			return ATM_O2
@@ -204,7 +204,7 @@
 		else
 			return null
 
-/obj/machinery/atmospherics/omni/filter/proc/switch_filter(var/dir, var/mode)
+/obj/machinery/atmospherics/omni/atmos_filter/proc/switch_filter(var/dir, var/mode)
 	//check they aren't trying to disable the input or output ~this can only happen if they hack the cached tmpl file
 	for(var/datum/omni_port/P in ports)
 		if(P.dir == dir)
@@ -213,7 +213,7 @@
 
 	switch_mode(dir, mode)
 
-/obj/machinery/atmospherics/omni/filter/proc/switch_mode(var/port, var/mode)
+/obj/machinery/atmospherics/omni/atmos_filter/proc/switch_mode(var/port, var/mode)
 	if(mode == null || !port)
 		return
 	var/datum/omni_port/target_port = null
@@ -246,14 +246,14 @@
 
 	update_ports()
 
-/obj/machinery/atmospherics/omni/filter/proc/rebuild_filtering_list()
+/obj/machinery/atmospherics/omni/atmos_filter/proc/rebuild_filtering_list()
 	filtering_outputs.Cut()
 	for(var/datum/omni_port/P in ports)
 		var/gasid = mode_to_gasid(P.mode)
 		if(gasid)
 			filtering_outputs[gasid] = P.air
 
-/obj/machinery/atmospherics/omni/filter/proc/handle_port_change(var/datum/omni_port/P)
+/obj/machinery/atmospherics/omni/atmos_filter/proc/handle_port_change(var/datum/omni_port/P)
 	switch(P.mode)
 		if(ATM_NONE)
 			initialize_directions &= ~P.dir
diff --git a/code/game/mecha/combat/combat.dm b/code/game/mecha/combat/combat.dm
index 77087ed32f..5d692b39b9 100644
--- a/code/game/mecha/combat/combat.dm
+++ b/code/game/mecha/combat/combat.dm
@@ -265,13 +265,13 @@
 
 /obj/mecha/combat/Topic(href,href_list)
 	..()
-	var/datum/topic_input/filter = new (href,href_list)
-	if(filter.get("close"))
+	var/datum/topic_input/top_filter = new (href,href_list)
+	if(top_filter.get("close"))
 		am = null
 		return
 	/*
-	if(filter.get("saminput"))
-		if(md5(filter.get("saminput")) == am)
+	if(top_filter.get("saminput"))
+		if(md5(top_filter.get("saminput")) == am)
 			occupant_message("From the lies of the Antipath, Circuit preserve us.")
 		am = null
 	return
diff --git a/code/game/mecha/equipment/tools/medical_tools.dm b/code/game/mecha/equipment/tools/medical_tools.dm
index acd680ba57..4e895b2b62 100644
--- a/code/game/mecha/equipment/tools/medical_tools.dm
+++ b/code/game/mecha/equipment/tools/medical_tools.dm
@@ -105,15 +105,15 @@
 
 	Topic(href,href_list)
 		..()
-		var/datum/topic_input/filter = new /datum/topic_input(href,href_list)
-		if(filter.get("eject"))
+		var/datum/topic_input/top_filter = new /datum/topic_input(href,href_list)
+		if(top_filter.get("eject"))
 			go_out()
-		if(filter.get("view_stats"))
+		if(top_filter.get("view_stats"))
 			chassis.occupant << browse(get_occupant_stats(),"window=msleeper")
 			onclose(chassis.occupant, "msleeper")
 			return
-		if(filter.get("inject"))
-			inject_reagent(filter.getType("inject",/datum/reagent),filter.getObj("source"))
+		if(top_filter.get("inject"))
+			inject_reagent(top_filter.getType("inject",/datum/reagent),top_filter.getObj("source"))
 		return
 
 	proc/get_occupant_stats()
@@ -473,19 +473,19 @@
 
 	Topic(href,href_list)
 		..()
-		var/datum/topic_input/filter = new (href,href_list)
-		if(filter.get("toggle_mode"))
+		var/datum/topic_input/top_filter = new (href,href_list)
+		if(top_filter.get("toggle_mode"))
 			mode = !mode
 			update_equip_info()
 			return
-		if(filter.get("select_reagents"))
+		if(top_filter.get("select_reagents"))
 			processed_reagents.len = 0
 			var/m = 0
 			var/message
 			for(var/i=1 to known_reagents.len)
 				if(m>=synth_speed)
 					break
-				var/reagent = filter.get("reagent_[i]")
+				var/reagent = top_filter.get("reagent_[i]")
 				if(reagent && (reagent in known_reagents))
 					message = "[m ? ", " : null][known_reagents[reagent]]"
 					processed_reagents += reagent
@@ -497,14 +497,14 @@
 				occupant_message("Reagent processing started.")
 				log_message("Reagent processing started.")
 			return
-		if(filter.get("show_reagents"))
+		if(top_filter.get("show_reagents"))
 			chassis.occupant << browse(get_reagents_page(),"window=msyringegun")
-		if(filter.get("purge_reagent"))
-			var/reagent = filter.get("purge_reagent")
+		if(top_filter.get("purge_reagent"))
+			var/reagent = top_filter.get("purge_reagent")
 			if(reagent)
 				reagents.del_reagent(reagent)
 			return
-		if(filter.get("purge_all"))
+		if(top_filter.get("purge_all"))
 			reagents.clear_reagents()
 			return
 		return
diff --git a/code/game/mecha/mecha.dm b/code/game/mecha/mecha.dm
index 56149a254c..db8fc51992 100644
--- a/code/game/mecha/mecha.dm
+++ b/code/game/mecha/mecha.dm
@@ -1498,10 +1498,10 @@
 		return
 	if(usr.stat > 0)
 		return
-	var/datum/topic_input/filter = new /datum/topic_input(href,href_list)
+	var/datum/topic_input/top_filter = new /datum/topic_input(href,href_list)
 	if(href_list["select_equip"])
 		if(usr != src.occupant)	return
-		var/obj/item/mecha_parts/mecha_equipment/equip = filter.getObj("select_equip")
+		var/obj/item/mecha_parts/mecha_equipment/equip = top_filter.getObj("select_equip")
 		if(equip)
 			src.selected = equip
 			src.occupant_message("You switch to [equip]")
@@ -1532,7 +1532,7 @@
 		return
 	if(href_list["rfreq"])
 		if(usr != src.occupant)	return
-		var/new_frequency = (radio.frequency + filter.getNum("rfreq"))
+		var/new_frequency = (radio.frequency + top_filter.getNum("rfreq"))
 		if ((radio.frequency < PUBLIC_LOW_FREQ || radio.frequency > PUBLIC_HIGH_FREQ))
 			new_frequency = sanitize_frequency(new_frequency)
 		radio.set_frequency(new_frequency)
@@ -1574,11 +1574,11 @@
 		return
 	if(href_list["req_access"] && add_req_access)
 		if(!in_range(src, usr))	return
-		output_access_dialog(filter.getObj("id_card"),filter.getMob("user"))
+		output_access_dialog(top_filter.getObj("id_card"),top_filter.getMob("user"))
 		return
 	if(href_list["maint_access"] && maint_access)
 		if(!in_range(src, usr))	return
-		var/mob/user = filter.getMob("user")
+		var/mob/user = top_filter.getMob("user")
 		if(user)
 			if(state==0)
 				state = 1
@@ -1586,18 +1586,18 @@
 			else if(state==1)
 				state = 0
 				user << "The securing bolts are now hidden."
-			output_maintenance_dialog(filter.getObj("id_card"),user)
+			output_maintenance_dialog(top_filter.getObj("id_card"),user)
 		return
 	if(href_list["set_internal_tank_valve"] && state >=1)
 		if(!in_range(src, usr))	return
-		var/mob/user = filter.getMob("user")
+		var/mob/user = top_filter.getMob("user")
 		if(user)
 			var/new_pressure = input(user,"Input new output pressure","Pressure setting",internal_tank_valve) as num
 			if(new_pressure)
 				internal_tank_valve = new_pressure
 				user << "The internal pressure valve has been set to [internal_tank_valve]kPa."
 	if(href_list["remove_passenger"] && state >= 1)
-		var/mob/user = filter.getMob("user")
+		var/mob/user = top_filter.getMob("user")
 		var/list/passengers = list()
 		for (var/obj/item/mecha_parts/mecha_equipment/tool/passenger/P in contents)
 			if (P.occupant)
@@ -1623,20 +1623,20 @@
 		P.go_out()
 		P.log_message("[occupant] was removed.")
 		return
-	if(href_list["add_req_access"] && add_req_access && filter.getObj("id_card"))
+	if(href_list["add_req_access"] && add_req_access && top_filter.getObj("id_card"))
 		if(!in_range(src, usr))	return
-		operation_req_access += filter.getNum("add_req_access")
-		output_access_dialog(filter.getObj("id_card"),filter.getMob("user"))
+		operation_req_access += top_filter.getNum("add_req_access")
+		output_access_dialog(top_filter.getObj("id_card"),top_filter.getMob("user"))
 		return
-	if(href_list["del_req_access"] && add_req_access && filter.getObj("id_card"))
+	if(href_list["del_req_access"] && add_req_access && top_filter.getObj("id_card"))
 		if(!in_range(src, usr))	return
-		operation_req_access -= filter.getNum("del_req_access")
-		output_access_dialog(filter.getObj("id_card"),filter.getMob("user"))
+		operation_req_access -= top_filter.getNum("del_req_access")
+		output_access_dialog(top_filter.getObj("id_card"),top_filter.getMob("user"))
 		return
 	if(href_list["finish_req_access"])
 		if(!in_range(src, usr))	return
 		add_req_access = 0
-		var/mob/user = filter.getMob("user")
+		var/mob/user = top_filter.getMob("user")
 		user << browse(null,"window=exosuit_add_access")
 		return
 	if(href_list["dna_lock"])
@@ -1669,9 +1669,9 @@
 	/*
 	if(href_list["debug"])
 		if(href_list["set_i_dam"])
-			setInternalDamage(filter.getNum("set_i_dam"))
+			setInternalDamage(top_filter.getNum("set_i_dam"))
 		if(href_list["clear_i_dam"])
-			clearInternalDamage(filter.getNum("clear_i_dam"))
+			clearInternalDamage(top_filter.getNum("clear_i_dam"))
 		return
 	*/
 
diff --git a/code/game/mecha/mecha_control_console.dm b/code/game/mecha/mecha_control_console.dm
index 00a0654cc1..de1f20fe0a 100644
--- a/code/game/mecha/mecha_control_console.dm
+++ b/code/game/mecha/mecha_control_console.dm
@@ -41,19 +41,19 @@
 	Topic(href, href_list)
 		if(..())
 			return
-		var/datum/topic_input/filter = new /datum/topic_input(href,href_list)
+		var/datum/topic_input/top_filter = new /datum/topic_input(href,href_list)
 		if(href_list["send_message"])
-			var/obj/item/mecha_parts/mecha_tracking/MT = filter.getObj("send_message")
+			var/obj/item/mecha_parts/mecha_tracking/MT = top_filter.getObj("send_message")
 			var/message = sanitize(input(usr,"Input message","Transmit message") as text)
 			var/obj/mecha/M = MT.in_mecha()
 			if(message && M)
 				M.occupant_message(message)
 			return
 		if(href_list["shock"])
-			var/obj/item/mecha_parts/mecha_tracking/MT = filter.getObj("shock")
+			var/obj/item/mecha_parts/mecha_tracking/MT = top_filter.getObj("shock")
 			MT.shock()
 		if(href_list["get_log"])
-			var/obj/item/mecha_parts/mecha_tracking/MT = filter.getObj("get_log")
+			var/obj/item/mecha_parts/mecha_tracking/MT = top_filter.getObj("get_log")
 			stored_data = MT.get_mecha_log()
 			screen = 1
 		if(href_list["return"])
diff --git a/code/modules/power/supermatter/setup_supermatter.dm b/code/modules/power/supermatter/setup_supermatter.dm
index 559f035cb2..262616ed6a 100644
--- a/code/modules/power/supermatter/setup_supermatter.dm
+++ b/code/modules/power/supermatter/setup_supermatter.dm
@@ -233,7 +233,7 @@
 
 /obj/effect/engine_setup/filter/activate()
 	..()
-	var/obj/machinery/atmospherics/omni/filter/F = locate() in get_turf(src)
+	var/obj/machinery/atmospherics/omni/atmos_filter/F = locate() in get_turf(src)
 	if(!F)
 		log_and_message_admins("## WARNING: Unable to locate omni filter at [x] [y] [z]!")
 		return SETUP_WARNING