As the previous two answers may indicate, your question is unfortunately very vague and open to interpretation, given the vastness of the field of computing and IT. In an effort to help you I will attempt to give you an answer using best-guess assumptions:
- since you are asking this question in the "Computers for Beginners" category, I will assume you are using one of Microsoft's Windows operating systems;
- as Windows XP is still the most popular/common operating system used by web surfers (e.g.
http://www.w3schools.com/browsers/browsers_os.asp), I will assume you are using it;
- you don't specify what you mean by "computer history", so I can only assume you mean either that of the operating system itself, or perhaps one of its applications - also, since the Net is becoming so Web-oriented, you could be speaking of your browser.
From an operating system standpoint, people generally mean the most recently accessed documents when speaking of the "history". In Windows XP, this is accessed via the Start -> My Recent Documents menu item (if this item can't be found in your Start menu, right-click on the Start button, select Properties from the context menu that appears, then make sure the "Start menu" radio button is selected and click on the Customize... button; under the Advanced tab at the bottom is a checkbox that says "List my most recently opened documents" - make sure it is ticked).
From a general application standpoint, most Windows applications will have their own "recent documents" list of some sort - either with its own sub-menu flyout, or with a separate section listing these files. Most applications having this list would have it under the "Files" menu item.
Web browsers generally have a history list of some sort, generally more detailed than most other applications. Both Internet Explorer and Mozilla Firefox have history "bars", which open up in a side panel of the browser window, showing the links visited by timeframe - usually in days and weeks. To access this bar in either browser, the most quick method is to hit the Ctrl and H keys simultaneously.
Should none of this information help you in any way, or be remotely what you intended asking for, perhaps you should consider rewording your question. If you were looking for more detailed information than that, then unfortunately the likelihood is you will have to download and install some other application to get it, assuming that which you are looking for is actually stored on your machine.