The Univac Buffer Processor (BP) was used in several real-time computer system installations in the 1960s as a network concentrator and front end system to the UNIVAC 418 and UNIVAC 490/494 real-time systems. A notable set of installations was at British European Airways in London (the BEACON Online Reservations system). The initial reservations system at B.E.A. comprised over 200 agent sets in London, connected to the Univac 490 via a network of eight Univac Buffer Processors. The Buffer Processor's internal structure comprised 32,768 "words" of 9 bits each.