Page "Digital Equipment Corporation" Paragraph 40

The PDP-11 supported several operating systems, including Bell Labs ' new Unix operating system as well as DEC's DOS-11, RSX-11, IAS, RT-11, DSM-11, and RSTS / E.

Many early PDP-11 applications were developed using standalone paper-tape utilities.

DOS-11 was the PDP-11's first disk operating system, but was soon supplanted by more capable systems.

RSX provided a general-purpose multitasking environment and supported a wide variety of programming languages.

IAS was a time-sharing version of RSX-11D.

Both RSTS and Unix were time-sharing systems available to educational institutions at little or no cost, and these PDP-11 systems were destined to be the " sandbox " for a rising generation of engineers and computer scientists.

Large numbers of PDP-11 / 70s were deployed in telecommunications and industrial control applications.

AT & T became DEC's largest customer.