Manufacturer: Apple
Launches: 1979
Manufactured in USA
CPU: MOS Technology 6502 @ 1.023MHz
Memory: 16 KB ~ 64 KB
Hard drive: None
Operative System: CP/M

This evolution of the Apple II included Microsoft's Applesoft BASIC programming language in ROM.

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Manufacturer: Tandy
Launches: 1979
Manufactured in USA
CPU: Zilog Z80 @ 4MHz
Memory: 32 KB ~ 64 KB
Hard drive: None
Operative System: TRSDOS

The evolution of the first model sold by RadioShack, aimed at businesses.

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Manufacturer: Atari
Launches: 1979
CPU: MOS Tecnology 6502 @ 1.79MHz
Memory: 8 KB ~ 48 KB
Support: Cassette
Hard drive: None
Operative System: Atari DOS

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Manufacturer: Atari
Launches: 1979
CPU: MOS Tecnology 6502 @ 1.79MHz
Memory: 8 KB ~ 48 KB
Support: Cassette
Hard drive: None
Operative System: Atari DOS

It had more expandability than its younger brother, the Atari 400.

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