...

Layer 1: General classification of systems

1. Europe/American Homecomputer like C64 / Amiga / Atari
2. asian Homecomputer like PC88 / PC98
3. Consoles like NES / Playstation / Xbox
4. Handhelds like Gameboy / Lynx / PSP
5. Mobiles / Mobile Operating System like iPhone / Palm / Windows Mobile
6. Tablets like iPad
7. Operating Systems like DOS / Windows / Linux
8. Arcade
9. cross-platform environments like Flash / HTML / Z-Code
10. DVD-Player-Games

Layer 1 of this list is finalized here!

Layer 2: concrete platform from every entry of level 1

...

1. Acorn Archimedes

2. Acorn Atom

3. Acorn Electron
4. Amstrad CPC
   

   1. CPC 464/664/6128

   2. CPC 464/6128+/GX4000 (Console)
5. Amstrad PCW (Joyce)
   
   1. PCW 8256/8512
   2. PCW 9256/9512
6. APF Imagination Machine
7. Apple I
8. Apple II/III
   
   1. Apple II
   2. Apple II+
   3. Apple IIc
   4. Apple IIc+
   5. Apple IIe
   6. Apple IIGS
   7. Apple III
9. Apple Macintosh
   
   1. Macintosh 68K series
   2. Macintosh PPC series
   3. Macintosh Intel
10. Aquarius
11. Atari 8bit
    
    1. Atari 400/800 series
    2. Atari XL/XE series
12. Atari 16/32bit
    
    1. Atari ST series
    2. Atari STe series
    3. Atari TT
    4. Atari Falcon 030
13. BBC Micro series
    
    1. BBC Model A
    2. BBC Model B
    3. BBC B+
    4. BBC Master
14. Camputers Lynx
15. Coleco Adam
16. Colour Genie
17. Commodore 16/+4
18. Commodore C64
19. Commodore C128
20. Commodore Amiga series
    
    1. Amiga 500
    2. Amiga 600
    3. Amiga 1000
    4. Amiga 1200
    5. Amiga 2000
    6. Amiga 3000
    7. Amiga 4000
    8. Amiga CD32 (? Console)
    9. Amiga CDTV (?Console)
21. Commodore PET series
22. Commodore VIC-20 (VC 20)
23. Compis
24. Comx 35
25. Dragon 32/64
26. Enterprise 64/128
27. Exelvision
28. Exidy Sorcerer
29. Jupiter ACE
30. Lambda 8300
31. Luxor
    1. ABC80
    2. ABC800
32. Matra-Hachette
    1. Alice 32
    2. Alice 90
33. Memotech MTX
34. Microbee
35. MSX series
    
    1. MSX 1
    2. MSX 2
    3. MSX 2+
    4. MSX Turbo R
36. Newbrain
37. Oric
    
    1. Oric-1
    2. Oric Atmos
    3. Oric Telestrat
38. PC-Booter (IBM compatible)
39. Philips VG5000
40. Risc PC
41. Robotron KC
    
    1. KC 85/2-4
    2. KC 87
42. SAM Coupé
43. Sinclair Spectrum
    
    1. Spectrum 16/48k
    2. Spectrum 128k/+2
    3. Spectrum +3
44. Sinclair QL
45. Sord M5
46. Spectravideo SVI
    1. SV318
    2. SV328
47. Tandy Color Computer
    
    1. TRS-80 CoCo 1,2
    2. TRS-80 CoCo 3
48. Tandy TRS-80 series
    
    1. Model I
    2. Model II/12
    3. Model III
    4. Model IV
49. Tandy MC10
    
    1. MC10
    2. Matra Alice
50. Tatung Einstein
    
    1. Tatung Einstein
    2. Tatung Einstein 256
51. Thomson MO
    
    1. Thomson MO5
    2. Thomson MO6
52. Thomson TO
    
    1. Thomson TO7
    2. Thomson TO7/70
    3. Thomson TO8
    4. Thomson TO9
    5. Thomson TO9+
53. TI-99/4 (A)
    
    1. TI-99/4
    2. TI-99/4A
54. Tomy Tutor
55. Vtech
    1. Laser 100
    2. Laser 200/VZ200/Salora Fellow
56. ZX80
57. ZX81

Layer 1.2: asian Homecomputer like PC88 / PC98

1. Bandai RX-78
2. Casio PV-2000
3. FM Towns
4. FMR 50
   
5. Fujitsu Micro 7x
   1. FM-7 series
      
   2. FM-77 series
      
   3. FM-77AV series  
6. Hitachi
   1. Basic Master
7. NEC PC-60/66
8. NEC PC-80
   1. PC-8001
   2. PC-8001mk2
   3. PC-8001mk2SR
9. NEC PC-88
10. NEC PC-98
11. NEC PC-100
12. Panasonic JR
    1. JR-100
    2. JR-200/JR-300
       
    3. JR-800
13. Sega SC-3000
14. Sharp MZ series
15. Sharp X68K
    
16. Sharp X1
    1. X1 series
    2. X1 Turbo series
       
17. Sony SMC
    1. SMC 70
    2. SMC 777
18. Sord M5
19. Tomy Pyuuta/Tutor
20. Toshiba Pasopia

Layer 1.3: Consoles like NES / Playstation / Xbox

...

1. 3DO
2. Apple Pippin
3. Atari 2600
4. Atari 5200
5. Atari 7800
6. Atari Jaguar
7. Atari Jaguar CD
8. Bally Astrocade
9. Casio PV-1000
10. Cassette Vision
11. CD-i
12. ColecoVision
13. Creativision
14. Dreamcast
15. Emerson Arcadia
16. Fairchild Channel F
17. Famicom Disk System
18. GameCube

19. Interton VC4000

20. Intellivision
21. Magnavox Odyssey
22. Master System
23. Mega CD
24. Mega Drive
25. Neo Geo AES
26. Neo Geo CD
27. Nintendo 64
28. Nintendo 64DD
29. Nintendo Entertainment System
30. PC-FX
31. Phillips Videopac G7000 (Odyssey²)
32. Phillips G7400 (Odyssey³)
33. Playstation 1
34. Playstation 2
35. Playstation 3
36. Playstation 4
37. RCA Studio II
38. Sega SG-1000
39. Sega 32X
40. Sega Pico
41. Sega Saturn 
42. Super A' can
43. Super Cassette Vision
44. Super Grafx
45. Super Nintendo Entertainment System
46. Turbografx-16 (PC Engine)
47. Turbografx-CD
48. Vectrex
49. Virtual Boy
50. Wii
51. Wii U
52. Xbox
53. Xbox 360
54. Xbox One

Layer 1.4: Handhelds like Gameboy / Lynx / PSP

1. Atari Lynx
2. Cougar Boy/Megaduck
3. Epoch Game Pocket Computer
4. Gamate
5. Game Boy
6. Game Boy Color
7. Game Boy Advance
8. Game.com
9. Game Gear
10. Gameking
11. Gizmondo
12. GP2X
13. GP32
14. Microvision
15. Neo Geo Pocket
16. Neo Geo Pocket Color
17. Nintendo 3DS
18. Nintendo DS
19. N-Gage
20. Sony PS Vita
21. Sony PSP
22. Supervision
23. Wonderswan
24. Wonderswan Color
25. Zodiac

Layer 1.5: Mobiles / Mobile Operating System like iPhone / Palm / Windows Mobile

1. Android
2. Bada
3. IOS
4. Palm
5. Psion
   1. Series 3
   2. Series 3a
   3. Series 5
6. Symbian
   
   1. S60 1st
   2. S60 2nd
   3. S60 3rd
   4. S60 5th
   5. Symbian^3
   6. Symbian Anna
   7. Nokia Belle
   8. S80
   9. S90
   10. UIQ 2x
   11. UIQ 3x
7. Windows Mobile
8. Z88

...

Layer 1.9: cross-platform environments like Flash / HTML / Z-Code

...

1. HTML
2. Flash
3. Z-code
4. Dial-up/telnet
5. BBS doors
6. IRC bots
7. CHIP-8

Layer 1.10: DVD-Player-Games

...

 Nintendo

• Color TV-Game 6 - Nur in Japan
• Color TV-Game 15 - Nur in Japan
• Color TV-Racing 112 - Nur in Japan
• Computer TV-Game - Nur in Japan

...