IBM 1620 is an assembly language created in 1959.
| #1921on PLDB | 65Years Old |
The IBM 1620 was announced by IBM on October 21, 1959, and marketed as an inexpensive "scientific computer". After a total production of about two thousand machines, it was withdrawn on November 19, 1970. Modified versions of the 1620 were used as the CPU of the IBM 1710 and IBM 1720 Industrial Process Control Systems (making it the first digital computer considered reliable enough for real-time process control of factory equipment). Read more on Wikipedia...
C F 8 4 2 1
1 0 1 0 – Record Mark (right most end of record, prints as a double dagger symbol, ‡)
1 1 0 0 – Numeric Blank (blank for punched card output formatting)
1 1 1 1 – Group Mark (right most end of a group of records for disk I/O)