Lear Siegler, Inc. (LSI) manufactured its first video display terminal in 1972 – the 7700A.
In 1973, LSI hired a new head of engineering, Jim Placak. He and his team created the ADM-1 … See more

The original ADM-3 terminal displayed only capital letters. In 1976, an option was added to allow it to display both lower and upper case. The … See more

In 1976, the ADM-3A was introduced. The ADM-3A added support for control codes to move the cursor around on the screen, and directly position the cursor at any point in the display. It … See more

• Teletype Model 33 See more

The ADM-3 followed and the first manufactured units were introduced at 1975 National Computer Conference in Anaheim, Calif., May 19–22, 1975, in booth 2348 at a … See more

The 5×7 dot matrix characters were displayed in amber, green, or white phosphor on black (the cursor was 7×9). The keyboard had 59 … See more

The use of the HJKL keys for moving the cursor in the vi editor and its descendants originated from the ADM-3A, University of California, Berkeley's Teletype Model 33 replacement, just … See more