As well as typewriters, the 1970s and 1980s office would also usually have at least one kind of calculation machine. So, lets explore our collection of calculators as well starting with the beefy desktop Triumph-Adler 814.
Also known as the Triumph-Adler EC1M (and built by Omrom in Singapore), the 814 was a large desktop calculator from 1973 built using LSI discrete logic. The calculator came in mains powered (as is our example) or battery powered versions. The calculator has the basic arithmetic functions and a memory. The calculator is designed for heavy duty number crunching in the likes of accounts or payroll departments and has a fold out stand on the back. It is also pretty well built.
There are also a few other function keys along the left-hand side, what operations A, K, CA and CI perform i don't know (however, on other calculators K is often used for carrying out calculations using a constant), unfortunately the calculator is non-operational so trial and error is out of the question. There is a sliding switch above the display, perhaps something to do with number of decimal places displayed? The display is an eight digit VFD (vacuum fluorescent display).
