Civil Rights
Movements, leaders, victories and the continuing fight for equality.
Explore the people, places, events, achievements, struggles and stories that shaped our journey.
Movements, leaders, victories and the continuing fight for equality.
Innovation, patents, science, technology and world-changing contributions.
Pioneers, champions, Negro Leagues, records, activism and excellence.
Meet the people whose lives, choices and achievements shaped the journey.
Black towns, communities, institutions and places where history happened.
Moments that changed communities, movements, institutions and the nation.
In 1968 Shirley Chisholm became the first Black woman elected to the United States Congress. In 1972 she launched a campaign for the Democratic presidential nomination, breaking another political barrier.
MORE →Reflects the personal views, recollections, and perspective of the author, Mike Davis.
This is a personal recollection on the Move fire on May 13, 1985
| pr | |
|---|---|
| Original authors | Ken Thompson, Dennis Ritchie (AT&T Bell Laboratories) |
| Developers | Various open-source and commercial developers |
| Release | November 3, 1971 |
| Operating system | Unix, Unix-like, Plan 9, OS-9, IBM i |
| Platform | Cross-platform |
| Type | Command |
| License | coreutils: GPLv3+ |
pr is a command on various operating systems that is used to paginate or columnate computer files for printing. It can also be used to compare two files side by side, as an alternative to diff.
It is a required program in a POSIX-compliant environment and has been implemented by GNU as part of the GNU Core Utilities. The command is available as a separate package for Microsoft Windows as part of the UnxUtils collection of native Win32 ports of common GNU Unix-like utilities.[1] It is also available in the OS-9 shell.[2] The pr command has also been ported to the IBM i operating system.[3]
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pr is a command on various operating systems that is used to paginate or columnate computer files for printing. It can also be used to compare two files side by side, as an alternative to diff. It is a required program in a POSIX-compliant environment and has been implemented by GNU as part of the GNU Core Utilities. The command is available as a separate package for Microsoft Windows as part of the UnxUtils collection of native Win32 ports of common GNU Unix-like utilities. It is also available in the OS-9 shell. The pr command has also been ported to the IBM i operating system.
Unix System Laboratories (USL), sometimes written UNIX System Laboratories to follow relevant trademark guidelines of the time, was an American software laboratory and product development company that existed from 1989 through 1993. At first wholly, and then majority, owned by AT&T, it was responsible for the development and maintenance of one of the main branches of the Unix operating system, the UNIX System V Release 4 source code product. Through Univel, a partnership with Novell, it was also responsible for the development and production of the UnixWare packaged operating system for Intel architecture. In addition it developed Tuxedo, a transaction processing monitor, and was responsible for certain products related to the C++ programming language. USL was based in Summit, New Jersey, and its CEOs were Larry Dooling followed by Roel Pieper. Created from earlier AT&T entities, USL was, as industry writer Christopher Negus has observed, the culmination of AT&T's long involvement in Unix, "a jewel that couldn't quite find a home or a way to make a profit." USL was sold to Novell in 1993.
cat is a shell command for writing the content of a file or input stream to standard output. The name is an abbreviation of catenate, a variant form of concatenate. Originally developed for Unix, it is available on many operating systems and shells today. In addition to combining files, cat is commonly used to copy files and in particular to copy a file to the terminal monitor. Unless redirected, cat outputs file content on-screen.
PR, P.R., Pr, pr, or Pr. may refer to:
Before the 1921 destruction of Tulsa’s Greenwood District, Black residents had created a remarkable center of business and community life. The district included stores, professional offices, entertainment venues and homes owned by Black citizens. Understanding Greenwood means learning what was built—not only what was burned.
MORE →Shirley Chisholm, elected in 1968.