| Name | Description | Year | Manufacturer | Rom | Clone | Sample |
| ntcash | NtCash (set 1) | 1999 | <unknown> | | | |
| ntcasha | NtCash (set 2) | 1999 | <unknown> | ntcash | ntcash | |
| ntopstar | Mahjong Nerae! Top Star (Japan) | 1990 | Nichibutsu | | | |
| ntvmys | Nittere Shiki! Mirai Yosou Studio / NTV Future Forecast Studio (Japan, Rev A) | 2000 | Sega / NTV | naomi | | |
| nubsupmf | NubSup Mini Game Fan | 2020 | <unknown> | | | |
| nubus | NuBus | | | | | |
| nubus_slot | NuBus slot | | | | | |
| nudgeit | Nudge-It | 1990 | Gottlieb | | | genpin |
| nugent | Nugent | 1978 | Stern | | | genpin |
| null_modem | RS-232 Null Modem | | | | | |
| numanath | Numan Athletics (World) | 1993 | Namco | | | |
| numanathj | Numan Athletics (Japan) | 1993 | Namco | numanath | numanath | |
| number_9_rev | Number Nine Revolution 512x32/1024x8 | | | | | |
| number1 | Number One | 1996 | San Remo Games | | | |
| number10 | Number Dieci (Poker) | 2000 | Playmark | | | |
| number10l | Number Dieci (Lattine) | 2000 | Playmark | number10 | number10 | |
| numcrash | Number Crash | 1983 | Hanshin Goraku / Peni | | | |
| nummunch | Electronic Number Muncher | 1989 | VTech | | | |
| nunchaku | Nunchackun | 1985 | Kaneko / Taito | ladymstr | ladymstr | |
| nupogodi | Nu, pogodi! | 1983 | bootleg (Elektronika) | gnw_mmouse | gnw_mmouse | |
| nuretemi | Nurete Mitaino... - Net Idol Hen (Japan) | 2000 | Nichibutsu/Love Factory | nichidvd | | |
| nv2a_agp | NV2A AGP Host to PCI Bridge | | | | | |
| nv2a_gpu | NVIDIA NV2A GPU | | | | | |
| nv2a_host | NV2A PCI Bridge Device - Host Bridge | | | | | |
| nv2a_ram | NV2A Memory Controller - SDRAM | | | | | |
| nvidia_nv3_vga | nVidia NV3 VGA i/f | | | | | |
| nvip | VIP (Novag) | 1987 | Novag Industries / Intelligent Heuristic Programming | | | |
| nvram | NVRAM | | | | | |
| nvs_machrider | Vs. Mach Rider (Endurance Course Version) | 1985 | Nintendo | | | |
| nvs_machridera | Vs. Mach Rider (Fighting Course Version, set MR4-1 A) | 1985 | Nintendo | nvs_machrider | nvs_machrider | |
| nvs_mightybj | Vs. Mighty Bomb Jack (Japan) | 1986 | Tecmo | | | |
| nvs_platoon | Vs. Platoon | 1987 | Ocean Software Limited | | | |
| nwarr | Night Warriors: Darkstalkers' Revenge (Europe 950316) | 1995 | Capcom | | | |
| nwarra | Night Warriors: Darkstalkers' Revenge (Asia 950302) | 1995 | Capcom | nwarr | nwarr | |
| nwarrb | Night Warriors: Darkstalkers' Revenge (Brazil 950403) | 1995 | Capcom | nwarr | nwarr | |
| nwarrh | Night Warriors: Darkstalkers' Revenge (Hispanic 950403) | 1995 | Capcom | nwarr | nwarr | |
| nwarru | Night Warriors: Darkstalkers' Revenge (USA 950406) | 1995 | Capcom | nwarr | nwarr | |
| nwarrud | Night Warriors: Darkstalkers' Revenge (USA 950406 Phoenix Edition) (bootleg) | 1995 | bootleg | nwarr | nwarr | |
| nws1250 | NWS-1250 | 1990 | Sony | | | |
| nws1580 | NWS-1580 | 1988 | Sony | | | |
| nws3260 | NWS-3260 | 1991 | Sony | | | |
| nws3410 | NWS-3410 | 1991 | Sony | | | |
| nws3720 | NWS-3720 | 1991 | Sony | | | |
| nws3860 | NWS-3860 | 1989 | Sony | | | |
| nws5000x | NET WORK STATION NWS-5000X | 1994 | Sony | | | |
| nws831 | NWS-831 | 1987 | Sony | | | |
| nxm3301 | XM-3301TA CD-ROM (New) | | | | | |
| nxm5301sun | XM-5301B Sun 4x CD-ROM (New) | | | | | |
| nxm5401 | XM-5401B 4x CD-ROM (New) | | | | | |
| nxm5401sun | XM-5401B Sun 4x CD-ROM (New) | | | | | |
| nxm5701 | XM-5701B 12x CD-ROM (New) | | | | | |
| nxm5701sun | XM-5701B Sun 12x CD-ROM (New) | | | | | |
| nyanpani | Nyan Nyan Panic (Japan) | 1988 | Konami | kittenk | kittenk | |
| nycaptor | N.Y. Captor (rev 2) | 1985 | Taito | | | |
| nyjoker | New York Joker | 2000 | High Video | | | |
| nyny | New York! New York! | 1980 | Sigma Enterprises Inc. | | | |
| nynyg | New York! New York! (Gottlieb) | 1980 | Sigma Enterprises Inc. (Gottlieb license) | nyny | nyny | |
| nytsudo | The New York Times Sudoku | 200? | Excalibur Electronics / Nice Code | | | |
| nzeroteam | New Zero Team (V33 SYSTEM TYPE_B hardware) | 1997 | Seibu Kaihatsu | zeroteam | zeroteam | |
| nzeroteama | New Zero Team (V33 SYSTEM TYPE_B hardware, Zhongguo Shantou Yihuang license) | 1997 | Seibu Kaihatsu (Zhongguo Shantou Yihuang license) | zeroteam | zeroteam | |
| nzeroteamb | New Zero Team (V33 SYSTEM TYPE_B hardware, Haoyunlai Trading Company license) | 1997 | Seibu Kaihatsu (Haoyunlai Trading Company license) | zeroteam | zeroteam | |
| o2 | O2 | 1996 | Silicon Graphics Inc. | | | |
| o2_4in1 | Videopac 40 Cartridge | | | | | |
| o2_cart_slot | Odyssey 2 Cartridge Slot | | | | | |
| o2_chess | Videopac C7010 Cartridge | | | | | |
| o2_homecomp | Videopac+ C7420 Cartridge | | | | | |
| o2_ktaa | Videopac+ KTAA Cartridge | | | | | |
| o2_rally | Videopac+ 60 Cartridge | | | | | |
| o2_rom | Odyssey 2 Standard Cartridge | | | | | |
| o2_test | Videopac Service Test Cartridge | | | | | |
| o2_testpl | Videopac+ Service Test Cartridge | | | | | |
| o2_voice | Odyssey 2 The Voice Cartridge | | | | | |
| o286foxii | Fox II | 198? | Octek | ibm5170 | ibm5170 | |
| oa_d34v | Apple/Sony 3.5 SD (400K GCR) | | | | | |
| ob68k1a | OB68K1A Single Board Computer | 1982 | Omnibyte | | | |
| ob8 | OB8 | 1983 | Oberheim | | | |
| obaoba | Oba-Oba (set 1) | 1980 | Taito do Brasil | | | genpin |
| obaoba1 | Oba-Oba (set 2) | 1980 | Taito do Brasil | obaoba | obaoba | genpin |
| obaobao | Oba-Oba (old hardware) | 1980 | Taito do Brasil | obaoba | obaoba | genpin |
| obdmx | DMX | 1980 | Oberheim | | | |
| obladi | Ob-La-Di | 199? | Gaelco / Cresmatic | | | |
| oc2000 | OC-2000 | 1979 | SOE | krvnjvtv | krvnjvtv | |
| oceanhun | The Ocean Hunter (Revision A) | 1998 | Sega | | | |
| oceanhuna | The Ocean Hunter | 1998 | Sega | oceanhun | oceanhun | |
| oceanpar | Ocean Paradise (V105US) | 1999 | IGS | | | |
| oceanpar101us | Ocean Paradise (V101US) | 1999 | IGS | oceanpar | oceanpar | |
| ocfoxm | Fox M 286 | 1990 | Octek | ibm5170 | ibm5170 | |
| ochaken | Ocha-Ken Hot Medal | 2007 | Sega | segasp | | |
| ochawk | Hawk | 199? | Octek | ibm5170 | ibm5170 | |
| ochipcom | Hippo COM | 199? | Octek | ibm5170 | ibm5170 | |
| ochipdca2 | Hippo DCA2 | 1994 | Octek | ibm5170 | ibm5170 | |
| ochipvlp | Hippo VL+ | 199? | Octek | ibm5170 | ibm5170 | |
| ocjagii | Jaguar II | 1992 | Octek | ibm5170 | ibm5170 | |
| ocjagv | Jaguar V v1.4 | 1992 | Octek | ibm5170 | ibm5170 | |
| ocpanii | Panther II | 199? | Octek | ibm5170 | ibm5170 | |
| octane | Octane (Version 6.5 Rev 4.9 05/22/03) | 1997 | Silicon Graphics Inc | | | |
| octekg2 | 286 motherboard with Headland G2 chipset | 199? | Octek | ibm5170 | ibm5170 | |
| octopus | LSI Octopus | 1986 | Digital Microsystems | | | |
| octopus_kb | Octopus Keyboard | | | | | |
| octopussy | Octopussy | 2000 | Covielsa | mastcrane | mastcrane | |
| ocxt286 | XT-286 motherboard | 198? | Octek | ibm5170 | ibm5170 | |
| odeontw | Odeon Twister (v1.4) | 1998 | CD Express | cubo | | |
| odeontw2 | Odeon Twister 2 (v202.19) | 1998 | CD Express | cubo | | |
| odin | Odin | 1985 | Peyper | | | genpin |
| odin_dlx | Odin De Luxe | 1985 | Sonic | | | genpin |
| odinp | Odin (prototype) | 1985 | Peyper | odin | odin | genpin |
| odisea | Odisea Paris-Dakar | 1987 | Peyper | | | genpin |
| odyssey | Odyssey | 1998 | Silicon Gaming | | | |
| odyssey2 | Odyssey 2 (US) | 1979 | Magnavox | videopac | videopac | |
| odyssey3 | Odyssey 3 Command Center (US, prototype) | 1983 | Philips | videopacp | videopacp | |
| oedfight | Oedo Fight (Japan, Bloodshed version) | 1994 | Kaneko | bloodwar | bloodwar | |
| oedfighta | Oedo Fight (Japan, Bloodless version) | 1994 | Kaneko | bloodwar | bloodwar | |
| offensiv | Offensive (Spanish bootleg of Scramble) | 1981 | bootleg (Video Dens) | scramble | scramble | |
| officeye | Office Yeo In Cheon Ha (version 1.2) | 2001 | Danbi | | | |
| offroad | Ironman Ivan Stewart's Super Off-Road (rev 4) | 1989 | Leland Corporation | | | |
| offroad3 | Ironman Ivan Stewart's Super Off-Road (rev 3) | 1989 | Leland Corporation | offroad | offroad | |
| offroadc | Off Road Challenge (v1.63) | 1997 | Midway | | | |
| offroadc0 | Off Road Challenge (v1.00) | 1997 | Midway | offroadc | offroadc | |
| offroadc1 | Off Road Challenge (v1.10) | 1997 | Midway | offroadc | offroadc | |
| offroadc3 | Off Road Challenge (v1.30) | 1997 | Midway | offroadc | offroadc | |
| offroadc4 | Off Road Challenge (v1.40) | 1997 | Midway | offroadc | offroadc | |
| offroadc5 | Off Road Challenge (v1.50) | 1997 | Midway | offroadc | offroadc | |
| offroadt | Ironman Ivan Stewart's Super Off-Road Track-Pak (rev 4?) | 1989 | Leland Corporation | | | |
| offroadt2p | Ironman Ivan Stewart's Super Off-Road Track-Pak (rev 4, 2 players) | 1989 | Leland Corporation | offroadt | offroadt | |
| offrthnd | Offroad Thunder | 2000 | Midway Games | | | |
| offtwall | Off the Wall (2/3-player upright) | 1991 | Atari Games | | | |
| offtwallc | Off the Wall (2-player cocktail) | 1991 | Atari Games | offtwall | offtwall | |
| ogonsiro | Ougon no Shiro (Japan) | 1986 | Allumer / Taito Corporation | gladiatr | gladiatr | |
| ohare | Apple O'Hare PCI I/O ASIC | | | | | |
| ohbakyuun | Oh! Bakyuuun (Japan, OB1/VER.A) | 1999 | Eighting / Raizing / Namco | ghlpanic | ghlpanic | |
| ohci_gc | OHCI Game Controller | | | | | |
| ohci_hlean2131qc | OHCI an2131qc HLE | | | | | |
| ohci_hlean2131sc | OHCI an2131sc HLE | | | | | |
| ohmygod | Oh My God! (Japan) | 1993 | Atlus | | | |
| ohpaipee | Oh! Paipee (Japan 890227) | 1989 | Nichibutsu | | | |
| oigas | Oigas (bootleg) | 1986 | bootleg | gigas | gigas | |
| oinori | Oinori-daimyoujin Matsuri | 2003 | Sega | naomi | | |
| oisipuzl | Oishii Puzzle Ha Irimasenka | 1993 | Sunsoft / Atlus | | | |
| ojanko2 | Ojanko Yakata 2bankan (Japan) | 1987 | V-System Co. | | | |
| ojankoc | Ojanko Club (Japan, Program Ver. 1.3, set 1) | 1986 | V-System Co. | | | |
| ojankoca | Ojanko Club (Japan, Program Ver. 1.2) | 1986 | V-System Co. | ojankoc | ojankoc | |
| ojankocb | Ojanko Club (Japan, Program Ver. 1.3, set 2) | 1986 | V-System Co. | ojankoc | ojankoc | |
| ojankohs | Ojanko High School (Japan) | 1988 | V-System Co. | | | |
| ojankoy | Ojanko Yakata (Japan) | 1986 | V-System Co. | | | |
| ojousan | Ojousan (Japan 871204) | 1987 | Nichibutsu | | | |
| ojousanm | Ojousan (Japan 870108, medal) | 1987 | Nichibutsu | ojousan | ojousan | |
| okean240 | Okeah-240 | 1986 | <unknown> | | | |
| okean240a | Ocean-240 with FDD | 1986 | <unknown> | okean240 | okean240 | |
| okean240t | Ocean-240 Test ROM | 1986 | <unknown> | okean240 | okean240 | |
| okhota | Okhota | 1989 | bootleg (Elektronika) | gnw_mmouse | gnw_mmouse | |
| okim6258 | OKI MSM6258 ADPCM | | | | | |
| okim6295 | OKI MSM6295 ADPCM | | | | | |
| okim6376 | OKI MSM6376 ADPCM | | | | | |
| okim6588 | OKI MSM6588 ADPCM Recorder | | | | | |
| okim6650 | OKI MSM6650 ADPCM | | | | | |
| okim9810 | OKI MSM9810 ADPCM | | | | | |
| olds | Oriental Legend Super / Xiyou Shi E Zhuan Super (ver. 101, Korean Board) | 1998 | IGS | pgm | | |
| olds100 | Oriental Legend Special / Xiyou Shi E Zhuan Super (ver. 100, set 1) | 1998 | IGS | olds | olds | |
| olds100a | Oriental Legend Special / Xiyou Shi E Zhuan Super (ver. 100, set 2) | 1998 | IGS | olds | olds | |
| olds103t | Xiyou Shi E Zhuan Super (ver. 103, China, Tencent) (unprotected) | 1998 | bootleg | olds | olds | |
| oldsplus | Oriental Legend 2 (Korea) / Xiyou Shi E Zhuan Qunmoluanwu (World, China, Japan, Hong Kong, Taiwan) (ver. 205) [Oriental Ex] | 2004 | IGS | pgm | | |
| oldsplus203 | Oriental Legend 2 (Korea) / Xiyou Shi E Zhuan Qunmoluanwu (World, China, Japan, Hong Kong, Taiwan) (ver. 203) [Oriental Ex] | 2004 | IGS | oldsplus | oldsplus | |
| olibochu | Oli-Boo-Chu (USA) | 1981 | Irem (GDI license) | | | |
| olibug | Oli Bug (bootleg of Jump Bug) | 1982 | bootleg | jumpbug | jumpbug | |
| oligam | Olympian Games (Russia) | 2005 | Astro Corp. | | | |
| olihockey | Olimpic Hockey (EM Bubble Hockey, set 1) | 1985 | Inor | | | |
| olihockeya | Olimpic Hockey (EM Bubble Hockey, set 2) | 1985 | Inor | olihockey | olihockey | |
| olim203 | M203 motherboard | 199? | Olivetti | ibm5170 | ibm5170 | |
| olivm15 | M15 | 198? | Olivetti | ibm5150 | ibm5150 | |
| olivpc1 | Prodest PC 1 | 1987 | Olivetti | ibm5150 | ibm5150 | |
| ollie | Ollie King (GDX-0007) | 2003 | Sega / Amusement Vision | chihiro | | |
| olmandingc | Olivmandingo (Spanish bootleg of Mandinga on Galaxian hardware, set 2) | 1982 | bootleg (Calfesa) | amidar | amidar | |
| olmandingo | Olivmandingo (Spanish bootleg of Mandinga on Galaxian hardware, set 1) | 1982 | bootleg | amidar | amidar | |
| olybossb | Olympia BOSS B | 1981 | Olympia International | olybossd | olybossd | |
| olybossc | Olympia BOSS C | 1981 | Olympia International | olybossd | olybossd | |
| olybossd | Olympia BOSS D | 1981 | Olympia International | | | |
| olym65bj | Black Jack (Olympic Games, v5.04, upgrade kit for Wild Card) | 1989 | Olympic Video Gaming PTY LTD | | | |
| olym65wc | Wild Card (Olympic Games, v2.0) | 1989 | Olympic Video Gaming PTY LTD | | | |
| olymp | Olympus (Z Games, version 10) | 2000? | Z Games | | | |
| olympic | Olympic Games | 1984 | Jeutel | | | genpin |
| olympic5 | Olympic 5 (V112US) | 2005 | IGS | | | |
| olympic5107us | Olympic 5 (V107US) | 2003 | IGS | olympic5 | olympic5 | |
| olympus | Olympus (Juegos Populares) | 1986 | Juegos Populares | | | genpin |
| olypeopl | People PC | 1983 | Olympia International | | | |
| olyport40 | Olyport 40-21 | 198? | AEG Olympia | ibm5170 | ibm5170 | |
| olysoc92 | Olympic Soccer '92 (set 1) | 1992 | Seibu Kaihatsu | cupsoc | cupsoc | |
| olysoc92a | Olympic Soccer '92 (set 2) | 1992 | Seibu Kaihatsu | cupsoc | cupsoc | |
| olysoc92b | Olympic Soccer '92 (set 3) | 1992 | Seibu Kaihatsu | cupsoc | cupsoc | |
| olystar20f | Olystar 20F | 198? | AEG Olympia | ibm5150 | ibm5150 | |
| olytext | Olympia Olytext 20 | 1985 | Olympia International | | | |
| olytext30 | Olytext 30 | 198? | AEG Olympia | ibm5150 | ibm5150 | |
| omar1 | Omar I | 1979 | Tryom | | | |
| omar2 | Omar II | 1979 | Tryom | | | |
| omatsuri | Shimura Ken no Bakatono-sama Ooedomatsuri | 1999 | NMK / Sega | | | |
| omdisv22 | Oldsmobile Driver Information System (version 2.2 CH) | 1990? | General Motors | | | |
| omega | Omega | 1986 | Nihon System | | | |
| omegaa | Omega (earlier) | 1986 | Nihon System | omega | omega | |
| omegab | Omega (bootleg?) | 19?? | bootleg? | theend | theend | |
| omegaf | Omega Fighter | 1989 | UPL | | | |
| omegafs | Omega Fighter Special | 1989 | UPL | omegaf | omegaf | |
| omegrace | Omega Race (set 1) | 1981 | Midway | | | |
| omegrace2 | Omega Race (set 2) | 1981 | Midway | omegrace | omegrace | |
| omegrace3 | Omega Race (set 3, 7/27) | 1981 | Midway | omegrace | omegrace | |
| omni | Omni | 19?? | bootleg (Videa System) | pisces | pisces | |
| omni_l1 | Omni (Shuffle) (L-1) | 1980 | Williams/United | | | genpin |
| omni2 | Omni II Logic Analyzer | 198? | Kaypro Corporation | kayproii | kayproii | |
| omni4 | Omni 4 Logic Analyzer | 198? | Omni Logic Inc. | kaypro484 | kaypro484 | |
| omniwave | Samsung Omniwave | | | | | |
| omotesnd | Omotesandou (Japan 890215) | 1989 | Anime Tec | | | |
| omti_disk_image | OMTI 8621 ESDI disk | | | | | |
| omti5100 | OMTI 5100 | | | | | |
| omti8621ap | OMTI 8621 ESDI/floppy controller (Apollo) | | | | | |
| omti8621isa | OMTI 8621 ESDI/floppy controller (ISA) | | | | | |
| omv_cart_slot | Tsukuda Original Othello Multivision FG-1000 / FG-2000 Cartridge Slot | | | | | |
| omv1000 | Othello Multivision FG-1000 | 1984 | Tsukuda Original | sg1000 | sg1000 | |
| omv2000 | Othello Multivision FG-2000 | 1984 | Tsukuda Original | sg1000 | sg1000 | |
| ondrat | Ondra | 1989 | Tesla | | | |
| ondrav | Ondra ViLi | 1989 | ViLi | ondrat | ondrat | |
| one4all | One For All (0101503V, New Zealand) | 2001 | Aristocrat | aristmk5 | | |
| onemeg | 1 Mb Interface | | | | | |
| oneshot | One Shot One Kill | 1996 | Promat | | | |
| onetwo | One + Two | 1997 | Barko | | | |
| onetwoe | One + Two (earlier) | 1997 | Barko | onetwo | onetwo | |
| onlinertp | Onliner Touch Party | 200? | Comatel / Atata Systems | | | |
| onna34ro | Onna Sanshirou - Typhoon Gal (rev 1) | 1985 | Taito | | | |
| onna34roa | Onna Sanshirou - Typhoon Gal (bootleg) | 1985 | bootleg | onna34ro | onna34ro | |
| onyx | Onyx (Brazil/Prototype) | 1982 | Microdigital | coleco | coleco | |
| ooparts | OOPArts (prototype, joystick hack) | 1992 | hack | | | |
| op386wb | OPTi 386WB VER.1.0 | 199? | OPTi | ibm5170 | ibm5170 | |
| op5cards | Open 5 Cards | 1987 | MNG | | | |
| op82c283 | 386sx motherboards using the OPTi 82C283 chipset | 199? | <unknown> | ibm5170 | ibm5170 | |
| op82c291 | 386sx motherboards using the OPTi 82C291 chipset | 199? | <unknown> | ibm5170 | ibm5170 | |
| op82c381 | 386 motherboards using the OPTi 82C381 chipset | 199? | <unknown> | ibm5170 | ibm5170 | |
| op82c391 | 386 motherboards using the OPTi 82C391 chipset | 199? | <unknown> | ibm5170 | ibm5170 | |
| op82c392 | 486 motherboards using the OPTi OPTi 82C392, 82C493 chipset | 199? | <unknown> | ibm5170 | ibm5170 | |
| opaopa | Opa Opa (MC-8123, 317-0042) | 1987 | Sega | | | |
| opaopan | Opa Opa (Rev A, unprotected) | 1987 | Sega | opaopa | opaopa | |
| opengolf | Konami's Open Golf Championship (ver EAE) | 1994 | Konami | konamigx | | |
| opengolf2 | Konami's Open Golf Championship (ver EAD) | 1994 | Konami | opengolf | opengolf | |
| openice | NHL Open Ice: 2 on 2 Challenge (rev 1.21) | 1995 | Midway | | | |
| openicea | NHL Open Ice: 2 on 2 Challenge (rev 1.2A) | 1995 | Midway | openice | openice | |
| openmj | Open Mahjong (Japan) | 1981? | Sapporo Mechanic | royalmj | royalmj | |
| oplayer | OPlayer Mobile Game Console (MGS03-white) (Family Sport 100-in-1) | 200? | OPlayer / Senca | | | |
| opsesam | Open Sesame (0351309, US) | 200? | Aristocrat | aristmk6 | | |
| opthund | Operation: Thunder | 1992 | Gottlieb | | | genpin |
| opti495slc | 386 motherboards using a OPTi 82C495SLC chipset | 199? | <unknown> | ibm5170 | ibm5170 | |
| opti495xlc | 386 motherboards using a OPTi 82C495XLC chipset | 199? | <unknown> | ibm5170 | ibm5170 | |
| opti82c861 | OPTi 82C861 "FireLink" USB OHCI controller | | | | | |
| optiger | Operation Tiger (Ver 2.14 O) | 1998 | Taito | | | |
| optigera | Operation Tiger (Ver 2.10 O) | 1998 | Taito | optiger | optiger | |