Browser = the software that allows you to see all the neat pictures and read the text on web pages. The browser is a program that rearranges the "packets" of data (which make up the text and images of a web page) downloading into your computer through the telephone line or your cable TV cable into a properly-formatted web page. These packets usually arrive out of order, so the browser has to put each one in its proper place.
The most popular browsers, of course, are Microsoft Internet Explorer, Mozilla Firefox, Netscape, Safari, Opera and the America Online browser. These browsers have become so sophisticated now that they are able to play music and show videos, too.