If you've got output that needs to be heard, then you need a speaker to project the sound being generated by the computer. The Walk-Through Computer uses a bubble jet printer. Other types of printers are dot matrix printers and laser printers. Software is the instructions that tell the computer what to do. Software is also called a computer program.
Software can be a game, a word processing program, or an Internet browser.
Software is written in computer languages. The smallest unit of information in binary code is called a bit. Eight bits make a byte. And a byte can make a letter of the alphabet. Add up many bits to make a word.