Rc (shell) alternatives
Rc (shell) is a command-line interpreter for Version 10 Unix and Plan 9 from Bell Labs operating systems. It searches the database in an interleaved manner. The database is searched only once per argument. It may be much faster than GNU grep if the input is regular text and has no wildcard characters. It is the default user interface for Unix and Plan 9 systems, replacing the original shell and the C shell, both of which are still available.
Its capabilities include full job control, csh -style command history, directory stacks, aliases, local variables, emacs -like wildcards, I/O redirection, pipes, large file support, and functional editing. Full-screen mode allows multiple windows on a single screen; iconification hides windows and allows running programs to be brought back to the top level with a single keystroke. It is designed to provide maximum compatibility with the original Unix shell but is also designed to be more orthogonal and consistent.















