Apple III

The Apple III (often rendered as Apple ///) was a business-oriented personal computer produced and released by Apple Computer in 1980, intended as the successor to the highly successful Apple II series but ultimately regarded as a significant commercial failure.

Background and Development

Following the massive success of the Apple II in the home and education markets, Apple Computer sought to expand its footprint into the lucrative corporate and business computing sector. Development of the Apple III began in early 1978 under the leadership of hardware designer Wendell Sander. Steve Wozniak, the co-creator of the Apple II, was largely uninvolved in the project, having temporarily left the company. Steve Jobs exerted considerable influence over the industrial design, most notably insisting that the computer be built without a cooling fan to ensure silent operation. This decision introduced severe thermal engineering challenges that would later plague the machine.

Hardware and Design

The Apple III was powered by a MOS Technology 6502 microprocessor, similar to its predecessor, but it was clocked at a faster 2 MHz. It featured a new system bus architecture and initially supported up to 256 KB of random-access memory (RAM), which was later expandable. The machine included a built-in 5.25-inch floppy disk drive and utilized a custom-designed keyboard.

However, the hardware design was fundamentally compromised by Jobs's mandate for a fanless chassis. The aluminum case was intended to act as a passive heat sink, but it proved insufficient to dissipate the heat generated by the tightly packed internal components. Consequently, early units suffered from severe overheating issues, which frequently caused the integrated circuits to pop out of their sockets. Furthermore, the Apple III featured a proprietary bus and fewer expansion slots than the Apple II, which alienated third-party hardware developers who had built a thriving ecosystem around the older machine.

Operating System and Software

The Apple III introduced Apple SOS (Sophisticated Operating System), a significant technical advancement over the Apple DOS. SOS featured a hierarchical file system, dynamic memory allocation, and a more robust device management architecture. Despite its technical merits, SOS was entirely incompatible with the vast library of existing Apple II software.

To compensate for the lack of third-party software at launch, Apple bundled the Apple III with a suite of business applications, including a spreadsheet, a word processor, and a database program. However, these bundled applications were often criticized for being less intuitive and less powerful than competing software available on other platforms. Crucially, VisiCalc—the "killer app" that had driven Apple II sales—was not immediately ported to the Apple III, leaving the system without a compelling reason for businesses to upgrade.

Commercial Reception and Failure

Announced in May 1980 and shipped in November of that year, the Apple III was priced between $4,340 and $7,800, making it a premium and expensive offering. The combination of its high price, severe hardware reliability issues, and a lack of compelling software resulted in poor market reception. The overheating problem became a notorious embarrassment for Apple; in a widely mocked anecdote, the company's initial troubleshooting advice for crashing machines was to lift the computer slightly and drop it to force the chips back into their sockets.

While the Apple II continued to generate the vast majority of the company's revenue, the Apple III sold poorly. Estimates of total sales vary, but it is generally agreed that only between 65,000 and 120,000 units were sold, falling drastically short of Apple's expectations.

Apple III Plus and Discontinuation

In an attempt to salvage the product line, Apple introduced the Apple III Plus in late 1983. This revised model addressed many of the original hardware flaws, featured a redesigned and more reliable keyboard, included a built-in real-time clock, and was sold at a significantly reduced price. Despite these improvements, the damage to the Apple III's reputation in the business community was irreversible.

The Apple III Plus failed to reverse the product line's fortunes, and Apple officially discontinued the entire Apple III series in September 1985. By this time, the company's strategic focus had firmly shifted toward the development and release of the Apple Lisa and the original Macintosh.

Legacy

Although a commercial failure, the Apple III served as a critical learning experience for Apple Computer. It highlighted the dangers of prioritizing industrial design over thermal engineering and underscored the importance of backward compatibility and third-party developer support. The architectural concepts and file system designs pioneered in Apple SOS influenced the development of subsequent Apple operating systems, including the Macintosh. Ultimately, the failure of the Apple III reinforced the dominance of the Apple II line within the company's portfolio during the early 1980s and shaped Apple's future approach to hardware and software integration.