The most commonly used feature in Internet Browser is the back button. However, all browsers also have a small down arrow to the right of the buttons (as shown in the below picture). This button allows you to see the history of the last 5-10 pages you’ve visited and quickly get back to them. This feature is especially helpful for those pesky pages that forward you back to a page each time you press the back button or for when you wish to move back several pages but don’t want to have to press the back button several times.


If you’ve visited a web page in the past but forgot to bookmark it when you were there, that page can be quickly and found by searching your browser history. To search your Internet browsers history press Ctrl + H or Apple + H to open the browsers history. Once in the browser history window type a keyword that you remember about the page. For example, searching for computer would find Computer Hope and any other computer related pages you’ve recently visited.


Make your Internet Explorer or Mozilla Firefox the full screen without all the toolbars by pressing the F11 key. To restore the window back to how it was press F11 again.

Save on your printer ink by selectively printing in Windows Programs such as Microsoft Word, Excel, Internet Explorer (and other browser), WordPad, Outlook etc. to do these highlight portions of text you wish to print and click the Print icon or option in the File menu. In the printer dialog window (like the one shown below) under Page Range choose the option Selection.

Quickly bookmark any web page in all major browsers by pressing Ctrl + D on your keyboard. Pressing these two keys together will open the bookmarks or favorites for your browser and allow you to quickly place a bookmark for the page you’re currently at. For example, pressing the two keys now would bookmark this page.

Oops did you mistakenly close a tab you didn’t want to close? Press Ctrl + Shift + T to undo a close tab. pressing this more than once will undo multiple closed tabs. This feature works in all major browsers including Google Chrome, Mozilla Firefox, Internet Explorer, and Opera.

  • A power supply is installed in the back corner of the PC Case, next to the motherboard.
  • It converts 120vac (Stand House Power) into DC voltages that are used by other components in the PC.
  • A 20 conductor cable carries +5vdc, -5vdc +12vdc, -12vdc and ground to the motherboard.
  • Another pair of cables, each with four conductors and two 4-pin connectors daisy-chained along it, carry +5vdc, +12vdc and ground to the drives (hard, floppy and CD/DVD).
  • Typical PC power supplies are rated at 200-250 watts and sell for about $50-$70. Higher wattage supplies are available.

  • Although these are not the most sophisticated part of the system, they are just as important as any other component.
  • All the components in a PC are connected together and to power with wires and cables.
  • Ninety percent of all electronics problems (including PC’s) are the result of poor connections.
  • If you have a PC problem, it is always a good idea to first check that all the cables on your PC are plugged in and properly seated.

The PC Case is a thin sheet metal enclosure that houses the motherboard, power supply and various drives (HDD, FDD, CD and DVD)

  • Cases are offered in two styles, desktop and tower. Today the tower type is predominant. It stands upright and is much taller than it is wide. It is usually placed on the floor next to, or under a desk. The desktop has a pizza box profile and usually sites on the desktop.
  • Tower cases are offered in two basic sizes, one that can fit ATX (12” wide) motherboards and one that can accommodate ATX mini (8.5” wide) motherboard. The number of driver bays offered also varies depending on manufacturer.
  • The motherboard and power supply mount to the floor at the rear of the case. The drives (hard, floppy and CD/DVD) mount in enclosures called drive bays at the front of the case.
  • Cases run from $20 to $70 depending on size (ATX or ATX mini), number of drive bays and the wattage of the power supply.

  • Speakers and headphones are the primary audio output device for a PC.
  • Some monitors have speakers built into their sides. Other speakers are free standing.
  • Passive speakers plug into and are powered directly from the output signal provided by the ‘speaker out’ port on the sound card.
  • Active speakers amplify the sound signal from the sound card using battery or rectified AC house power.