Editing Sinclair Scientific (section)

==={{anchor|Scientific Programmable}}Sinclair Scientific Programmable===
The Sinclair Scientific Programmable was introduced in 1975, with the same case as the [[Sinclair Oxford]].<ref name=vtss>{{cite web |url=http://www.vintage-technology.info/pages/calculators/s/sincprog.htm |title=Sinclair Scientific Programmable |publisher=Vintage Technology |access-date=10 December 2013}}</ref> It was larger than the Scientific, at {{convert |73|x|155|x|34|mm|in}}, and used a larger [[Nine-volt_battery|PP3 battery]], but could also be powered by [[mains electricity]].<ref name=vcss/><ref name=vtss/>

It had 24-step programming abilities, which meant it was highly limited for many purposes.<ref name=vtss/><ref name=lim>{{cite web |url=http://www.rskey.org/CMS/index.php/7?manufacturer=Sinclair&model=Scientific+Programmable |title=Sinclair Scientific Programmable |publisher=rskey.org |access-date=10 December 2013}}</ref> It also lacked functions for the [[natural logarithm]] and [[exponential function]].<ref name=lim/> Constants used in programs were required to be [[integer]]s, and the programming was wasteful, with start and end quotes needed to use a constant in a program.<ref name=lim/><ref>{{cite web |url=http://www.geoff.org.uk/museum/sinclair.htm |title=Scientific programmable Calculator |publisher=geoff.org.uk |access-date=4 January 2014}}</ref>

However, included with the calculator was a library of over 120 programs that performed common operations in mathematics, geometry, statistics, finance, physics, electronics, engineering, as well as fluid mechanics and materials science.<ref name=lim/><ref>{{cite web |url=http://www.wass.net/manuals/Sinclair%20Scientific%20Programmable%20Library.pdf |title=Sinclair Scientific Programmable Library |publisher=Sinclair Radionics |access-date=10 December 2013}}</ref> There were over 400 programs in the full Sinclair Program Library.<ref>{{cite journal |url=https://books.google.com/books?id=w1bp8jnrbecC&pg=PA265 |journal=New Scientist |date=October 1975 |page=265 |title=NEW! Sinclair Scientific Programmable}}</ref>