Burroughs C3661 Desktop Calculator
Note: photo of Burroughs C-3660, which is identical in appearance to the C-3661.
Burroughs 16-digit Nixie display Desktop Programmable Calculator,
Circa 1971-1973. C3661 and C3600 were visually identical, but the
double the number of steps of program memory, a subroutine
capability, and additional test/branch operations. Mag-Card reader for
program storage. Early LSI chip-based calculating engine. Wanted in any
condition, working or not.