Less is a command-line utility for viewing and manipulating text files. It is similar to the more command, but has more features, such as the ability to search, scroll through text, and edit files in-place. Unlike more, less allows users to move forward and backward through a file, as well as search for text within the file. It is particularly useful for long files, such as logs, that are too long for the terminal window.
Minus is a file pager, Lynx is a browser.