1. What Is Computer?
1.1. A computer is an electronic device, operating under the control of instruction stored in its own memory, that can accept data, process the data according to specified rules, produce results, and store the results for future use.
1.2. Information processing cycle is the series of input, process, output, and storage activities.
1.3. Data is a collection of unprocessed items, which can include text, numbers, images, audio, and video.
1.4. Information conveys meaning and is useful to people.
2. The Components of Computer (Hardware+Software = Computer
2.1. INPUT DEVICE
2.1.1. Allows you to enter data and instruction into a computer
2.2. OUTPUT DEVICE
2.2.1. Hardware component that conveys information to one or more people
2.3. SYSTEM UNIT
2.3.1. Case that contains the electronic components of the computer that are used to process data
2.4. STORAGE DEVICE
2.4.1. Records (writes) and/or retrieves (reads) items to and from storage media
2.5. COMMUNICATION DEVICE
2.5.1. Enables a computer to send and receive data, instruction, and information to and from one or more computers or mobile devices
3. Computer Software
3.1. System Software
3.1.1. Operating system
3.1.2. Utility Program
3.2. Application Software
3.2.1. General-purposed
3.2.2. Specialized
3.2.3. Apps
3.3. Installing is the process of seYng up soFware to work with the computer, printer, and other hardware.
4. Type of Computer
4.1. Supercomputers
4.1.1. A supercomputer is the fastest, most powerful computer – Fastest supercomputers are capable of processing more than one quadrillion instruction in a single second
4.2. Mainfram Computers
4.2.1. A mainframe is a large, expensive, powerful computer that can handle hundreds or thousands of connected users simultaneously – occupy specially wired, air-conditioned rooms • Page 25 • Figure 1-26 and capable of great processing speeds and data storage Discove
4.3. Midrange Computers
4.3.1. A midrange computers or servers are computers with processing capabilities less powerful than a mainframe computer yet more powerful than a personal computer. – controls access to the hardware, software, and other resources on a network – provides a centralized storage area for programs, data, and information
4.4. Personal Computers
4.4.1. A personal computer can perform all of its input, processing, output, and storage activities by itself. • There are five types of personal computers: desktops, laptops, tablets, smartphones, and wearables.
5. Examples of Computer Usage
5.1. Home User • Personal financial management • Web access • Communications • Entertainment
5.2. Small Office/Home Office User • Look up information • Send and receive e-mail messages • Make telephone calls
5.3. Mobile User • Connect to other computers on a network or the Internet • Transfer information • Play video games • Listen to music • Watch movies
5.4. Power User • Work with multimedia • Use industry-specific software
5.5. Enterprise User • Communicate among employees • Process high volumes of transactions • Blog
6. Elements of an Information System
6.1. Hardware
6.1.1. includes keyboard, mouse, display, system unit, tablets, smartphones, and other devices.
6.2. Data
6.2.1. consists of unprocessed facts including text, numbers, images, and sounds.
6.3. Software
6.3.1. • provides step-by step instruction for computer hardware.
6.4. People
6.4.1. • are end users who use computers to make themselves more productive
6.5. Procedures
6.5.1. specify rules or guidelines for computer operations
6.6. Internet
6.6.1. allows computers to connect to people and other computers.
7. A Look to The Future
7.1. Internet and Web
7.2. Powerful Software
7.3. Powerful Hardware
7.4. Security , Privacy and Ethics
7.5. Organization
7.6. Changing Time
8. A World of Computers
8.1. At Home
8.2. At School
8.3. At Work
9. Computer literacy, or Digital literacy involves having a current knowledge and understanding of computers, mobile devices, the web, and related technologies
10. Advantages & Disadvantages Using Computers
10.1. ADVANTAGES
10.1.1. Speed
10.1.2. Reliability
10.1.3. Consistency
10.1.4. Storage
10.1.5. Communication
10.2. DISADVANTAGES
10.2.1. Health Risks
10.2.2. Violation Of Privacy
10.2.3. Public Safety
10.2.4. Impact On Labor Force
10.2.5. Impact On Environment
10.3. Green computing involves reducing the electricity consumed and environmental waste generated when using a computer
10.4. Strategies include: – Recycling – Regula7ng manufacturing processes – Extending the life of computers – Immediately dona7ng or properly disposing of replaced computers
11. Mobile Computers and Mobile Devices
11.1. MOBILE COMPUTERS -Personal computer you can carry from place to place
11.1.1. Examples include notebook computers, laptop computers, netbooks, ultra-thins, and Tablet PCs