Environment variable

Environment variables are a set of dynamic named values that can affect the way running processes will behave on a computer.

They are part of the environment in which a process runs. For example, a running process can query the value of the TEMP environment variable to discover a suitable location to store temporary files, or the HOME or USERPROFILE variable to find the directory structure owned by the user running the process.

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 OS X. From PC DOS 2.0 in 1982, all succeeding Microsoft operating systems including Microsoft Windows, and OS/2 also have included them as a feature, although with somewhat different syntax, usage and standard variable names.

Details

In all Unix and Unix-like systems, each process has its own separate set of environment variables. By default, when a process is created, it inherits a duplicate environment of its parent process, except for explicit changes made by the parent when it creates the child. At the API level, these changes must be done between running fork and exec. Alternatively, from command shells such as bash, a user can change environment variables for a particular command invocation by indirectly invoking it via env or using the ENVIRONMENT_VARIABLE=VALUE <command> notation. All Unix operating system flavors, DOS, and Windows have environment variables; however, they do not all use the same variable names. A running program can access the values of environment variables for configuration purposes.

CLS

CLS may refer to:

Academic fields

Education

Societies and associations

Software and technology

CLS (command)

In computing, CLS (for clear screen) is a command used by the command line interpreters COMMAND.COM and CMD.EXE on DOS, OS/2 and Microsoft Windows operating systems to clear the screen or console window of commands and any output generated by them. It does not clear the user's history of commands, however. The command is also available in the DEC RT-11 operating system. In other environments, such as Linux and Unix, the same functionality is provided by the clear command.

While the ultimate origins of using the three-character string CLS as the command to clear the screen likely predate Microsoft's use, this command was present before its MS-DOS usage, in the embedded ROM BASIC dialects Microsoft wrote for early 8-bit microcomputers (such as TRS-80 Color BASIC), where it served the same purpose. The MS-DOS dialects of BASIC written by Microsoft, BASICA and GW-BASIC, also have the CLS command as a BASIC keyword - as do various non-Microsoft implementations of BASIC such as BBC BASIC found on the BBC Micro computers. The CLS command is also present in BASIC versions for Microsoft Windows, however this generally clears text printed on the form, rather than the whole screen or controls on the form.

Creator

Creator is something or someone that brings something into being. It may also refer to:

Literature

Music

Creator (film)

Creator is a 1985 film directed by Ivan Passer, starring Peter O'Toole, Vincent Spano, Mariel Hemingway, and Virginia Madsen. It is based on a book of the same title by Jeremy Leven.

Plot

Dr. Harry Wolper is an eccentric medical professor teaching at a small southern California college who is obsessed with making a clone of his wife Lucy who died in childbirth 30 years earlier. Harry hires Boris Lafkin, a struggling pre-med student as his personal assistant to help him with his experiments by obtaining lab equipment and working in his backyard shed in exchange for which Harry gives Boris love life advice in courting an attractive coed named Barbara who slowly becomes smitten with Boris. To continue his research into cloning, Harry meets and employes a young woman, named Meli, who practically moves in with him on an agreement to contribute her ovary sample as part of the cloning progress. Meli slowly falls for the much older Harry who begins to question his ethics and vision of true love. Meanwhile, a rival of Harry's, fellow medical professor Dr. Sid Kuhlenbeck, tries to investigate and hinder Harry's cloning plans as part of a ploy to remove Harry from the university to take over Harry's lab for himself.

Creator (album)

Creator is the second album by American alternative rock band The Lemonheads. It was issued twice, as an LP in 1988, and as a CD in 1992, which included three bonus live tracks, recorded at the radio station VPRO in The Netherlands. It is one of only three albums to feature the full original lineup of Evan Dando, Ben Deily, and Jesse Peretz.

When the band first formed, Deily and Dando would swap instruments, playing guitar and singing on tracks each wrote himself, and drums for songs the other wrote. The first "official" Lemonheads drummer, Doug Trachten, was brought in for their first album Hate Your Friends. On Creator, John Strohm of the band Blake Babies plays drums on all of the original tracks, while Mark Natola played drums for the two live bonus songs at the end of the CD reissue. Also, by the time the live tracks were recorded—during the European tour supporting the Lemonheads' final TAANG! album, Lick (1989)—Deily had left the band to complete his degree at Harvard College; lead guitar on those tracks (and the voice of "Evan Dando" during the interview segment) is provided by Corey Loog Brennan.