Apple III Plus

The Apple III Plus is a personal computer that was designed, manufactured, and sold by Apple from 1983 to 1985 as part of the Apple III series. The computer has been introduced on December 1, 1983, and its price started at $2995.

The computer features a 1.4 MHz MOS Technology 6502B processor, 256 KB of RAM, 4 KB of ROM, optional 5 MB Apple ProFile hard drive, 140 KB 5.25” floppy drive, and built-in 74-key ASCII keyboard.

This computer has been discontinued on April 24, 1984.

Today Apple III Plus is 38 years old!

Apple III Plus
Source: – Apple III Plus

Apple III Plus Release Date and Original Price

IntroducedDecember 1, 1983
DiscontinuedApril 24, 1984
Model NumberUnknown
Original Price$2,995
Weight26 Ibs.
11.793 KG
Dimensions4.8” H x 17.5” W x 18.2” D
12.19 cm H x 44.45 cm W x 46.22 cm D

Tech Specs

ProcessorMOS Technology 6502B
Processor Speed1.4 MHz average
1.8 MHz maximum
Number of Cores1
Storage5MB Apple ProFile hard disc drive (Optional)
Built-in Memory256 KB
Maximum Memory512 KB with memory board replacement
Memory SlotsNone


SoftwareApple Sophisticated Operating System 1.3 (Apple SOS 1.3)


Serial1 – DB-25 RS-232C compatible
2 – DB-9
Audio Out1 – 3.5-mm analog output jack
1 – Built-in speaker
Display Connection1 – RCA composite positive video
1 – DB-15
Display1 – RCA for composite video output
(Display resolution 280 x 192 – 16 colors (with some limitations),
280 x 192 – monochromatic, 560 x 192 monochromatic)
Text Display80-column, 24-line monochromatic, 40-column, 24-line,
16-color foreground and background, 40-column, 24-line monochromatic
Expansion Slots4 – 50-pin Apple II peripheral
Media1 – 140 KB 5.25-inch floppy drive


KeyboardBuilt-in 61-key (main) 13-key (numeric) ASCII keyboard


Line Voltage110 or 110/220V AC

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