Desk Electronic Calculators" STYLE="background-repeat: no-repeat; background-image: url('../assets/images/autogen/--Desk-Electronic-Calculators_NStandardBanner.gif'); height: 88px; width: auto;"> The first commercial microprocessor, the Intel 4004, was developed specifically for Busicom Corporation for use in its calculators. The Busicom 141-PF, sold also as the NCR 18-36, was the first product so