1. Define input and differentiate among a program, command, and user response.
Input - A statement that expresses a personal opinion or belief or adds information.
- Something put into a system or expended in its operation to achieve output or a result.
- Data fed into a computer for processing.
Program- A computer program is a set of instructions for a computer to perform a specific task.
Command - Order by a superior to carry out an action. An individual can be commanded to do something. The word has a militaristic connotation in that commands given to those lower in rank must be obeyed.
When one is commanded to do something, one is compelled.In computers, instruction to perform a given procedure.
User Response-The user response was positive and enthusiastic. They became involved in the metaphor of the house tour and were interested in viewing each room. They asked questions about the various features and commented on the ones that they would like to have installed in their own home. The visitors also enjoyed much of the humor of the house and the quirky running commentary that the home comfort system provided. I was satisfied that they were attentive to the home comfort system voice in addition to all the other attractions the house provided.
2. Identify the keys and buttons commonly found on desktop computer keyboards, and describe how keyboards for mobile computers and devices differ from desktop computer keyboards.
A keyboard key that works like a shift key to activate a second function on a dual-purpose key. Commonly found on laptop keyboards, the Fn key is often used to control hardware functions such as screen brightness and speaker volume. The Fn key may also be found on extra small keyboards for desktop computers, typically for Page Up and Page Down, which are combined with Up Arrow and Down Arrow.
A Desktop Computer Keyboards is a personal computer (PC) in a form intended for regular use at a single location, as opposed to a mobile laptop or computer. Desktop and tower computers are two different styles of computer case that use desk space in varying ways. Desktop computers are designed to lay flat on the desk, while towers stand upright. Prior to the widespread use of microprocessors, a computer that could fit on a desk was considered remarkably small. "Desktop" indicates a horizontally-oriented computer case usually intended to have the display screen placed on top to save space on the desktop. Most modern desktop computers have separate screens and keyboards. Tower cases are sometimes incorrectly called desktop computers as some will locate them on a desk instead of on the floor under the desk. Cases intended for home theater PC systems are usually considered to be desktop cases in both senses, regardless of orientation and placement.
A Mobile Computer and Devices-including laptop computer, notebook computers, tablet computers, PDAs, smart phones, and portable data terminals-are now in the hands of hundreds of millions of people worldwide. The proliferation of mobile computer devices, and the number of places where they can be used, will increase the number of public library patrons who enter library facilities carrying a mobile computer device and who expect to be able to use it to access information.While the most widely accepted term for a computer device that is both portable and wireless is a "mobile computer device;" the term "mobile" is sometimes limited to devices that can be used while moving, as opposed to portable computers, which are only practical for use while in a stationary position. In this TechNote, the broader meaning of "mobile" is used. A cellular telephone is not a mobile computer device unless it includes a Web browser and has the capacity to download and manipulate files. When that is the case, the line between a cellular phone and a smart phone is blurred.
3. Describe different mouse types and explain how to use a mouse.
A. Diffrent mouse of types
The Mechanical mouse requires a ball to move the cursor on the screen. To get more efficacies with this type of mice, a flat surface named mouse pads is necessary.
The Optomechanical or Optical-mechanical mouse is a combination of the optical and the mechanical technologies. It uses a ball but detects the mouse movement optically. It is now the most commonly used with PC.
The Optical mouse uses a laser; precisely an optical sensor to help detecting the mouse’s moving. More expensive than the two other types, the optical mouses offer more precision and speed and even can be used on any surface
Laser Mouse- The most advanced type of mouse which uses laser in controlling the cursor. It can be used on almost all surfaces including tiles, paper, wood, etc.
Foot Mouse- A kind of mouse used by people with disorders.
Ball and Socket- The oldest type of mouse which uses a ball to control the cursor.
Gaming Computer Mouse-Often having variable weight, and sometimes even customizable buttons, a gaming mouse tends to offer both the most features and most flexibility, at the expense of a much higher price tag.
Trackball-Essentially used as an upside-down mouse, users rotate an enlarged ball that is tracked by sensors.
Touchpad-Touchpads are typically found on laptops as a space-saving alternative to a typical mouse. Touchpads typically consist of a touch-sensitive pad and two buttons which correlate to the buttons on a mouse.
B. How to use mouse
Mice (more than one mouse) can be used by either hand. If you are left handed, you can just place the mouse on the other side of the keyboard, if it reaches. The mouse will work the same.
Hold the mouse correctly. For Windows or PC users, place your pointer finger on the left button, and your ring finger on the right button. If your mouse has a button or 'wheel' in the middle, your middle finger can operate this. For Mac users, the mouse usually has only one button. Use any of your three center fingers to press the button.
To click, press the button (usually the left one, when there are two) and promptly release it. It should be a firm, quick tap, and the mouse should be still when you do it.
To double click (for opening applications, documents or folders), you must click (the left button) twice in rapid succession. If you have physical trouble with the required speed, your computer can be adjusted to suit your needs.
To drag files, press and hold the (left) button, then move the mouse without letting the button go until the file is where you want it to be.
4.Describe various types of touch screens and explain how a touch-sensitive pads works.
A graphics tablet (or digitizing tablet, graphics pad, drawing tablet is a computer input device that allows one to hand-draw images and graphics, similar to the way one draws images with a pencil and paper. These tablets may also be used to capture data or handwritten signatures.
A graphics tablet (also called pen pad or digitizer) consists of a flat surface upon which the user may "draw" an image using an attached stylus, a pen-like drawing apparatus. The image generally does not appear on the tablet itself but, rather, is displayed on the computer monitor. Some tablets however, come as a functioning secondary computer screen that you can interact with directly using the stylus.
Some tablets are intended as a general replacement for a mouse as the primary pointing and navigation device for desktop computers.
The first electronic handwriting tablet was the Telautograph, patented by Elisha Gray in 1888 .Elisha Gray is best known as a contemporaneous inventor of the telephone to Alexander Graham Bell.
The first graphics tablet resembling contemporary tablets and used for handwriting recognition by a computer was the Styalator in 1957. Better known (and often mis-stated as the first digitizer tablet) is the RAND Tablet[4] also known as the Grafacon (for Graphic Converter), introduced in 1964. The RAND Tablet employed a grid of wires under the surface of the pad that encoded horizontal and vertical coordinates in a small magnetic signal. The stylus would receive the magnetic signal, which could then be decoded back as coordinate information.
Other graphics tablets a commonly known as spark or acoustic tablets, used a stylus that generated clicks with a spark plug. The clicks were then triangulated by a series of microphones to locate the pen in space. The system was fairly complex and expensive, and the sensors were susceptible to interference by external noise.
Digitizers were popularized in the mid 1970s and early 1980s by the commercial success of the ID (Intelligent Digitizer) and BitPad manufactured by the Summagraphics Corp. These digitizers were used as the input device for many high-end CAD (Computer Aided Design) systems as well as bundled with PC's and PC based CAD software like AutoCAD.
Summagraphics also made an OEM version of its BitPad which was sold by Apple Computer as the Apple Graphics Tablet accessory to their Apple II. These tablets used a magnetostriction technology which used wires made of a special alloy stretched over a solid substrate to accurately locate the tip of a stylus or the center of a digitizer cursor on the surface of the tablet. This technology also allowed Proximity or "Z" axis measurement.
The first home computer graphics tablet was the KoalaPad. Though originally designed for the Apple II, the Koala eventually broadened its applicability to practically all home computers with graphics support, examples of which include the TRS-80 Color Computer, Commodore 64, and Atari 8-bit family. Competing tablets were eventually produced; the tablets produced by Atari were generally considered to be of high quality.
In 1981, musician Todd Rundgren created the first color graphics tablet software for personal computers, which was licensed to Apple as the Utopia Graphics Tablet System.
In the 1980s, several vendors of graphics tablets began to include additional functions, such as handwriting recognition and on-tablet menus.
Operation
