Page "Calculator" Paragraph 57

However, the efforts in integrated circuit development culminated in the introduction in early 1971 of the first " calculator on a chip ", the MK6010 by Mostek, followed by Texas Instruments later in the year.

Although these early hand-held calculators were very expensive, these advances in electronics, together with developments in display technology ( such as the vacuum fluorescent display, LED, and LCD ), lead within a few years to the cheap pocket calculator available to all.