Editing Apple III (section)

===Design===
[[Steve Wozniak]] and [[Steve Jobs]] expected hobbyists to purchase the Apple II; however, because of [[VisiCalc]] and [[Disk II]], small businesses purchased 90% of the computers.{{r|byte198501}} The Apple III was designed to be a business computer and successor. Though the Apple II contributed to the inspirations of several important business products, such as VisiCalc, [[Multiplan]], and [[Apple Writer]], the computer's hardware architecture, [[operating system]], and developer environment are limited.<ref name="apple2hist">{{Cite web |title=The Apple III SOS Reference Manual Vol 1 |url=https://archive.org/details/apple-iii-sos-reference-manual-vol-1/page/n40/mode/1up |url-status=dead |archive-url= |archive-date= |access-date= |website=Internet Archive}}</ref> Apple management intended to clearly establish [[market segmentation]] by designing the Apple III to appeal to the 90% business market, leaving the Apple II to home and education users. Management believed that "once the Apple III was out, the Apple II would stop selling in six months", Wozniak said.<ref name="byte198501">{{cite magazine |title=The Apple Story / Part 2: More History and the Apple III |magazine=[[Byte (magazine)|BYTE]] |publisher=UBM Technology Group|location=United States|volume=10|number=1|issn=0360-5280|oclc=637876171|date=January 1985 |author-last1=Williams |author-first1=Gregg |author-last2=Moore |author-first2=Rob |page=167 |type=interview |url=https://archive.org/details/198501_byte_magazine_vol_10_01_through_the_hourglass_pdf__mlib/page/174/mode/2up}}</ref>

The Apple III is powered by a 2 [[megahertz]] [[Synertek]] [[MOS Technology 6502|6502A]] or 6502B<ref>{{cite book |author1= |title=Apple III Owner's Guide |author2= |publisher=Apple Computer Inc. #A3L0001 |year=1981 |edition=3rd |pages=152–153 |language=English}}</ref><ref>{{Cite book |title=Apple III Benutzer Handbuch |publisher=[[Apple Inc.|Apple Computer International]] |year=1981 |pages=151 |language=de |trans-title=Apple III User Manual}}</ref>  [[8-bit]] [[central processing unit|CPU]] (operating effectively between 1.4 and 1.8&nbsp;MHz due to video or memory refresh cycles) and, like some of the later machines in the Apple II family, uses [[bank switching]] techniques to address memory beyond the 6502's traditional 64&nbsp;KB limit, up to 256&nbsp;KB in the III's case. Third-party vendors produced memory upgrade kits that allow the Apple III to reach up to 512&nbsp;KB of random-access memory (RAM). Other Apple III built-in features include an 80-column, 24-line display with upper and lowercase characters, a [[numeric keypad]], dual-speed (pressure-sensitive) cursor control keys, 6-bit ([[digital-to-analog converter|DAC]]) audio, and a built-in 140-kilobyte 5.25-inch [[floppy disk]] drive. Graphics modes include 560x192 in black and white, and 280x192 with 16 colors or shades of gray. Unlike the Apple II, the Disk III [[disk controller|controller]] is part of the logic board.

The Apple III is the first Apple product to allow the user to choose both a screen font and a keyboard layout: either [[QWERTY]] or [[Dvorak keyboard layout|Dvorak]]. These choices cannot be changed while programs were running. This was unlike the [[Apple IIc]], which has a keyboard switch directly above the keyboard, allowing the user to switch on the fly.