Version 7 Unix

Version 7 Unix for the PDP-11, running in the SIMH PDP-11 simulator
Screenshot of a PDP-11 booting Version 7 Unix in a simulator.

Important early release of the Unix operating system.

- Version 7 Unix

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Discontinued version of the Unix operating system for various microcomputer platforms, licensed by Microsoft from AT&T Corporation in the late 1970s.

Xenix under Bochs
IBM/Microsoft XENIX 1.00 on 5¼-inch floppy disk

Microsoft, which expected that UNIX would be its operating system of the future when personal computers became powerful enough, purchased a license for Version 7 UNIX from AT&T in 1978, and announced on August 25, 1980, that it would make the software available for the 16-bit microcomputer market.

Version 6 Unix

The first version of the Unix operating system to see wide release outside Bell Labs.

Version 6 Unix for the PDP-11, running in the SIMH PDP-11 simulator
John Lions' original books, source code and commentary
Browsing through /usr/source on Version 6 Unix, running on SIMH

It was superseded by Version 7 Unix in 1978/1979, although V6 systems remained in regular operation until at least 1985.

Research Unix

The term "Research Unix" refers to early versions of the Unix operating system for DEC PDP-7, PDP-11, VAX and Interdata 7/32 and 8/32 computers, developed in the Bell Labs Computing Sciences Research Center (CSRC).

Version 7 Unix for the PDP-11, running in SIMH

In 2002, Caldera International released Unix V1, V2, V3, V4, V5, V6, V7 on PDP-11 and Unix 32V on VAX as FOSS under a permissive BSD-like software license.

Tar (computing)

Computer software utility for collecting many files into one archive file, often referred to as a tarball, for distribution or backup purposes.

Tar archiving is often used together with a compression method, such as gzip, to create a compressed archive. As shown, the combination of the files in the archive are compressed as one unit.

The command-line utility was first introduced in the Version 7 Unix in January 1979, replacing the tp program (which in turn replaced "tap").

Environment variable

Dynamic-named value that can affect the way running processes will behave on a computer.

Charles Babbage, sometimes referred to as the "father of computing".

They were introduced in their modern form in 1979 with Version 7 Unix, so are included in all Unix operating system flavors and variants from that point onward including Linux and macOS.

Bourne shell

Shell command-line interpreter for computer operating systems.

Bourne shell interaction on Version 7 Unix
Version 7 Unix: the original Bourne shell manual page. PDP-11 simulation with SIMH
Interaction with pdksh in OpenBSD (default shell)

The Bourne shell was the default shell for Version 7 Unix.


Domain-specific language designed for text processing and typically used as a data extraction and reporting tool.

As one of the early tools to appear in Version 7 Unix, AWK added computational features to a Unix pipeline besides the Bourne shell, the only scripting language available in a standard Unix environment.


Brand name of Digital Equipment Corporation's (DEC) discontinued native Unix operating systems for the PDP-11, VAX, MicroVAX and DECstations.

RISC/ULTRIX 4.5, running Motif Window Manager

Under Canter's direction, UEG released V7M, a modified version of Unix 7th Edition (q.v.).


Acronym of Unix-to-Unix Copy.

Business card with UUCP email address

It was released in 1979 as part of Version 7 Unix.

Sun Microsystems

American technology company that sold computers, computer components, software, and information technology services and created the Java programming language, the Solaris operating system, ZFS, the Network File System (NFS), VirtualBox, and SPARC microprocessors.

Aerial photograph of the Sun headquarters campus in Santa Clara, California
Buildings 21 and 22 at Sun's headquarters campus in Santa Clara
Sun in Markham, Ontario, Canada
Sun server racks at Seneca College (York Campus)
Sun Microsystems at the Computer Museum of America in Roswell, Georgia
SPARCstation 1+
VirtualBox, purchased by Sun
A fountain within the Sun main campus in Santa Clara
Logo used on hardware products by Oracle

Sun's first workstation shipped with UniSoft V7 Unix.