1. The cat utility concatenates files printing the results to standard output.

2. Print selected parts of lines from each FILE to standard output.

3. Writes the specified data, followed by the current line terminator, to the standard output stream.

4. It compares two files of any type and writes the results to the standard output.

5. ConvolverPipe Convolves the standard input stdin to the standard output stdout using the specified impulse response (IR) filter

6. Writes the text representation of the specified objects, followed by the current line terminator, to the standard output stream using the specified format information.

7. The command line indent -st -bap -bli0 -i4 -l79 -ncs -npcs -npsl -fca -lc79 -fc1 -ts4 SomeFile.c indents SomeFile.c in a style resembling BSD/Allman style and writes the result to the standard output.