Monitor

The monitor works with a video card, located inside the computer case, to display images and text on the screen. Most monitors have control buttons that allow you to change your monitor's display settings, and some monitors also have built-in speakers.

Newer monitors usually have LCD (liquid crystal display) or LED (light-emitting diode) displays. These can be made very thin, and they are often called flat-panel displays. Older monitors use CRT (cathode ray tube) displays. CRT monitors are much larger and heavier, and they take up more desk space.

Mouse

Keyboard
The keyboard is one of the main ways to communicate with a computer. There are many different types of keyboards, but most are very similar and allow you to accomplish the same basic tasks.

The computer case is the metal and plastic box that contains the main components of the computer, including the motherboard, central processing unit (CPU), and power supply. The front of the case usually has an On/Off button and one or more optical drives.

Computer cases come in different shapes and sizes. A desktop case lies flat on a desk, and the monitor usually sits on top of it. A tower case is tall and sits next to the monitor or on the floor. All-in-one computers come with the internal components built into the monitor, which eliminates the need for a separate case.

Mouse alternatives
There are other devices that can do the same thing as a mouse. Many people find them easier to use, and they also require less desk space than a traditional mouse. The most common mouse alternatives are below.

Trackball: A trackball has a ball that can rotate freely. Instead of moving the device like a mouse, you can roll the ball with your thumb to move the pointer.

The mouse is another important tool for communicating with computers. Commonly known as a pointing device, it lets you point to objects on the screen, click on them, and move them.

There are two main mouse types: optical and mechanical. The optical mouse uses an electronic eye to detect movement and is easier to clean. The mechanical mouse uses a rolling ball to detect movement and requires regular cleaning to work properly.

​​Touchpad: A touchpad—also called a trackpad—is a touch-sensitive pad that lets you control the pointer by making a drawing motion with your finger. Touchpads are common on laptop computers.

42+ Text-Editing Keyboard Shortcuts That Work Almost Everywhere

Whether you’re typing an email in your browser or writing in a word processor, there are convenient keyboard shortcuts usable in almost every application. You can copy, select, or delete entire words or paragraphs with just a few key presses.

Some applications may not support a few of these shortcuts, but most applications support the majority of them. Many are built into the standard text-editing fields on Windows and other operating systems.

​​Working With Words
We’re used to the arrow, Backspace, and Delete keys working with a single character at a time. However, we can add the Ctrl key to have them effect entire words or paragraph at the same time.

Ctrl+Left Arrow – Move cursor to beginning of previous word.

Ctrl+Right Arrow – Move cursor to beginning of next word

Ctrl+Backspace – Delete previous word.

Ctrl+Delete – Delete next word.

Ctrl+Up Arrow – Move cursor to beginning of paragraph.

Ctrl+Down Arrow – Move cursor to end of paragraph.

Mac Users: Use the Option key instead of the Ctrl key.

Moving the Cursor
The Ctrl key can also be combined with the Home and End keys.

Home – Move cursor to beginning of current line.

End – Move cursor to end of current line.

Ctrl+Home – Move cursor to top of the text entry field.

Ctrl+End – Move cursor to bottom of the text entry field.

Page Up – Move cursor up a frame.

Page Down – Move cursor down a frame.

Selecting Text
All of the above shortcuts can be combined with the Shift key to select text.

Shift+Left or Right Arrow Keys – Select characters one at a time.

Shift+Up or Down Arrow Keys – Select lines one at a time.

Shift+Ctrl+Left or Right Arrow Keys – Select words – keep pressing the arrow keys to select additional words.

Shift+Ctrl+Up or Down Arrow Keys – Select paragraphs.

Shift+Home – Select the text between the cursor and the beginning of the current line.

Shift+End – Select the text between the cursor and the end of the current line.

Shift+Ctrl+Home – Select the text between the cursor and the beginning of the text entry field.

Shift+Ctrl+End – Select the text between the cursor and the end of the text entry field.

Shift+Page Down – Select a frame of text below the cursor.

Shift+Page Up – Select a frame of text above the cursor.

Ctrl+A – Select all text.

You can use several of these shortcuts to fine-tine your selected text. For example, you could press Shift+End to select the text to the end of the current line, and then press Shift+Down to also select the line below it.

​​After selecting text, you can start typing immediately to replace the text – you don’t have to press Delete first.

Editing
You can really speed up text-editing by using the Ctrl keyboard shortcuts to copy and paste text.

Ctrl+C, Ctrl+Insert – Copy selected text.

Ctrl+X, Shift+Delete – Cut selected text.

Ctrl+V, Shift+Insert – Paste text at cursor.

Ctrl+Z – Undo.

Ctrl+Y – Redo.