Apple III Plus
Source: - Apple III Plus

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 1 December 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. The product has been discontinued on 24 April 1984.

Today Apple III Plus is 37 years old!

Apple III Plus – General information


Introduced1 December 1983
Discontinued24 April 1984
Model NumberN/A
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


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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