Calculator calculator marketed to the Real Estate industry with preprogrammed functions to simplify the process of calculating payments and future values. In 1985, CI launched a calculator for the construction industry called the Construction Master which came preprogrammed with common construction calculations (such as angles, stairs, roofing math, pitch, rise, run, and feet-inch fraction conversions). This would be the first in a line of construction related calculators. The first desktop "programmable calculators" were produced in the mid-1960s by Mathatronics and Casio (AL-1000). These machines were very heavy and costly. The first programmable pocket calculator was the HP-65, in 1974; it had
Transitron Electronic Corporation Transitron Electronic Corporation Transitron Electronic Corporation was a semiconductor device fabrication company of the United States. It was founded by Leo and David Bakalar incorporated in Wakefield, Massachusetts, in 1952. David Bakalar was the president from 1952 to 1984. In 1986 the company went out of business, failing to keep pace with the rapid advances in technology. The company was established at the time of the economic boom in Massachusetts. Its first successful product was the gold bonded germanium diode, widely used in computers, military equipment, etc. After that the company manufactured silicon rectifiers (which David claims were the world