IBM 5406 System/3
On March 4, 2021 the Arlington (Massachusetts) Coal & Lumber Company donated an IBM 5406 Model B3 System/3, S/N 32379, including a 5444 Model 1 disk drive, S/N 48754, and a 5213 Model 2 printer, S/N 21627, and equipped with 12k bytes of core memory . This system was installed on Valentine's day in 1973 and was used to manage their inventory and billing.
The System/3 is the first member of IBM's Midrange Systems that were produced in Rochester Minnesota from July 30, 1969 to June 1985. The 5406 was introduced on October 28, 1970.
This list describes all of the features that were included when the machine was first built.
The disk drive in the original order is a 5444 Model 1 with a 1.2MB fixed and 1.2MB removable storage. The disk controller is actually jumpered for a 5444 Model 2 with 2.4MB fixed and 2.4MB removable storage. Sometime in the machine's working life the disk capacity was upgraded. The 5444 Model 1 and Model 2 drives are physically the same, but the Model 1 is restricted to 1/2 of the full capacity.
Optional Features that are not installed on this machine:
Bisynchronous Communications Adapter: Allows this system to talk to a mainframe through a modem. BISYNC allows you to transfer files and reports between the two machines, as well as run jobs on the other machine.
Serial I/O Channel: