IEEE spectrum
![]() |
![]() |
![]() |
|
December 1973 |
December 1976 | January 1978 | January 1980 |
![]() |
![]() |
||
November 1980 |
January 1981 |
February 1982 | December 1982 |
![]() |
![]() |
![]() |
![]() |
January 1983 | March 1983 | December 1983 | January 1984 |