The earliest PDP-8 model, informally known as a "Straight-8", was introduced on 22 March 1965 priced at $18,500 (equivalent to about $160,000 in 2021).It used diode–transistor logic packaged on flip chip cards in a machine about the size of a small household refrigerator.It was the first computer to be sold for under $20,000, making it the best-selling computer in history at that time.

IOT or IoT may refer to: . Internet of things, connecting everyday objects to the internet; Illuminates of Thanateros, an international magical organization; Inductive output tube, a variety of vacuum tube; Institute of Transportation, an agency in Taiwan; Interoperability testing, to determine the interoperability of a product; Input-Output Transfer, instructions for computers …

The slide rule was invented around 1620–1630, shortly after John Napier's publication of the concept of the logarithm. Edmund Gunter of Oxford developed a calculating device with a single logarithmic scale, which, with additional measuring tools, could be used to multiply and divide. The first description of this scale was published in Paris in 1624 by Edmund Wingate (c. 1593 …