Issue No.11 - November (1977 vol.10)
The release of the B876/B866 Systems and Communications Processors significantly increases Burroughs' capabilities in the distributed processing marketplace. The initial announcement identified two models of the B866 and a single model B876. The B866-1 is a 1 MHz processor, while the B866-2 and the B876 are 2 MHz processors. The two B866 processors are capable of supporting a maximum of seven data communications lines while the B876 can be equipped with a maximum of 32 lines.
"Special Feature Auerbach Product Survey on Computer Network Hardware", Computer, vol.10, no. 11, pp. 80-83, November 1977, doi:10.1109/C-M.1977.217571