service in informatics and analysis (sia ltd.) was one of the pioneering time-sharing service bureau companies in the late 1960s, later known as sia computer services. its head office was located at lower belgrave street, close to victoria station in london, and the company had branch offices in edinburgh, manchester, the west end, paris and (much later) in hong kong. sia offered terminal services via the post office telephone network at speeds of 10, 15, 30, 60 and 120 characters per second for teletype-style terminals and of 1200 baud, 2400 baud and 4800 baud for remote job entry terminals. later with the release of the ibm pc, systems were developed to emulate the remote batch and interactive terminals.