Editing Portable computer (section)

===IBM 5100===
[[File:IBM 5100 - MfK Bern.jpg|thumb|IBM 5100 (1975)]]
Successful demonstrations of the 1973 SCAMP prototype led to the first commercial [[IBM 5100]] portable microcomputer launched in 1975. The product incorporated an [[IBM PALM processor]], {{convert|5|in|adj=on}} CRT, full function keyboard and the ability to be programmed in both APL and BASIC for engineers, analysts, statisticians and other business problem-solvers. (IBM provided different models of the 5100 supporting only BASIC, only APL, or both selectable by a physical switch on the front panel.)<ref>This author learned this from an original IBM document for operators of the 5100 but does not recall the title of the document.</ref><ref>{{Cite web |url=http://www.classiccmp.org/dunfield/ibm5100/index.htm |title=Daves Old Computers- IBM 5100 |access-date=2019-03-08 |archive-url=https://web.archive.org/web/20071126062928/http://www.classiccmp.org/dunfield/ibm5100/index.htm |archive-date=2007-11-26 |url-status=dead }}</ref> [[IBM]] referred to its [[IBM PALM processor|PALM]] processor as a [[microprocessor]], though they used that term to mean a processor that executes [[microcode]] to implement a higher-level [[instruction set]], rather than its conventional definition of a complete processor on a single [[silicon]] [[integrated circuit]]; the PALM processor was a large circuit board populated with over a dozen chips. In the late 1960s, such a machine would have been nearly as large as two desks and would have weighed about half a ton ({{convert|0.5|ST|disp=out}}). In comparison, the IBM 5100 weighed about 53 pounds (24&nbsp;kg and very portable for that time).<ref>{{cite web|url=http://www.advantech.com/products/Portable-Computers/sub_1-2JKOHS.aspx |title=Industrial Portable Computers |publisher=Advantech |access-date=2014-07-22}}</ref>