Apple III Plus Apple III Plus

Apple III Plus Datasheet

On December 1st, 1983, Apple introduced a new addition to their Apple III series: the Apple III Plus. This personal computer was designed, manufactured, and sold by Apple from 1983 to 1985 and was met with mixed reviews upon its release.

The Apple III Plus was equipped with a 1.4 MHz MOS Technology 6502B processor, 256 KB of RAM, 4 KB of ROM, and an optional 5 MB Apple ProFile hard drive. It also featured a 140 KB 5.25” floppy drive and a built-in 74-key ASCII keyboard. The initial price for the computer was $2,995, making it a high-end option for consumers at the time.

However, despite its impressive specs, the Apple III Plus faced a number of technical issues and was ultimately discontinued on April 24th, 1984. Today, the computer is 40 years old and is considered a collector’s item for fans of vintage technology.

While the Apple III Plus may not have been a commercial success, it remains an important piece of Apple’s history and a glimpse into the company’s early efforts in the personal computer market.

Apple III Plus and Monitor III
Source: – Apple III Plus and Monitor III

Apple III Plus Details

IntroducedDecember 1, 1983
DiscontinuedApril 24, 1984
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

Apple III Plus 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


Display resolution280 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


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


Slots4 – 50-pin Apple II peripheral
Media1 – 140 KB 5.25-inch floppy drive


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


SoftwareApple Sophisticated Operating System 1.3 (Apple SOS 1.3)


Line Voltage110 or 110/220V AC

Further Reading and References

Disclaimer: The data presented in this article is under continuous development and has been manually collected from various sources based on their availability. The author of this article may revise this dataset as additional research is conducted and reviewed. Please note that the information is provided “as is” and “as available” without express or implied warranties. The author cannot be held responsible for any omissions, inaccuracies, or errors in the published information. Any warranties relating to this information are hereby disclaimed.

Last updated: March 7, 2023