read (shell builtin command)
grep -ci a
Input device
A Microphone does not output sound. It accepts sound. It is an input device.
The PDA accepts and processes input in various languages.
secret
secret
end of line mark.
0 1 2
dc is a reverse-polish desk calculator which supports unlimited precision arithmetic. It also allows you to define and call macros. Normally dc reads from the standard input; if any command arguments are given to it, they are filenames, and dc reads and executes the contents of the files before reading from standard input. All normal output is to standard output; all error output is to standard error.
The standard console input stream, std::cin.
a. cat and grep b. tr