Various front panels from the 1620 stand in for the Colossus computer's front panels.
Year of feature (shown above)
It may also be of interest that in the first scene, when Forbin is touring the innards of Colossus for the final time, there's a shot where in the near background is what appears to be an authentic disc-drive from that era, with multiple discs stacked vertically.
CDC supplied a lot of the front panels of Colossus within the mountain installation. I believe this is mentioned in the credits.
I take this is a very important movie, since it seems to be the first movie with the computer playing a centrain plotpoint?
Some eqipment provided by Control Data Corp. https://en.wikipedia.org/wiki/Control_Data_Corporation#Film_and_science_fiction_references
I remember this film appearing on American Movie Classics many years ago when they still did classic movies with host intro's and the host said that IBM wanted too much money and Control Data was more than happy to provide theirs.
I Think this is an important movie, if for no other reason than it portrays the first Denial Of Service Attack (well an attempt at one anyway) in all of motion picture history. Today everybody looks out for them and bad guys try to employ them but who was even thinking of them in 1970?
Great movie that reminds me a quote from one Authority Comic Book story:
"Uncle Sam does not build Doomsday machines that don't come with an off-button."
Replace Colossus by Skynet and you have the core plot fro, Terminator.
The console shown in close-up at the bottom is displaying a crazy number of "parity errors"! Plus, it appears to have been attempting to execute an '87' instruction which wasn't defined AFAIK. Not surprisingly, the red checkstop light on the far right is aglow.
In case you were wondering.