Around scienceSummit calculators were manufactured during the early to mid- 1970s. See the article "Summit: a Man and the Idea" in the Collecting Calculators section of this site.
Summit 3114
A desktop model with a 14-digit amber gas-discharge display dating from about 1972.
Summit SE88M
A typical chunky calculator from Summit. There is not enough room on the front for some of the buttons so these have been added to the top edge. This model dates from about 1972.