stdin, stdout and stderr

Bash:

• Read one line from stdin and assign words to variables
• Redirection
• echo writes its argument to standard out.

/dev/stdin, dev/stdout and /dev/stderr

tty

Using head to show a directory's largest n files

gets() in the standard C library.

R functions scan(), stdin

The Python built-in function input reads a line from stdin

Python: The attributes stdin, stdout and stderr of the sys module.

The .NET class System.Console

This Java example starts a new process and then reads the process's stdout to repeat it on the own stdout.

The In, Out and Error properties of the .NET System.Console class.

Using the PowerShell cmdlet select-string to match lines in STDOUT that match a given regular expressions.