Some computers have multiple text modes. You'll see multiple entries for these machines in the cross-reference file. Some of them came with a floppy drive as standard. This cross-reference lists the total storage space afforded by the floppy controller of each machine. The controller is assumed to be connected to the maximum possible number of drives and the drives are assumed to be using the largest acceptable media.
Numbers are in kilobytes.
The year the computer's production was discontinued Use this and the next cross-references for a rough chronology of the computers in the Machine Room. The year of release for the computer Have a look at this for a rough chronology of the computers in the Machine Room. Units manufactured This cross-reference category lists the number of units manufactured. Not many computers are listed here, but the information can help you assess their relative abundance. This is where you go if you want to find the biggest and smallest computers around.