Computer systems
The document describes different types of computer systems: desktop systems, mobile devices, and servers. It provides details on desktop systems, laptops, tablets, smartphones, and servers. Desktop systems are stationary PCs with components housed under or on a desk. Laptops are thin, portable computers with a screen and keyboard that can run on battery or be plugged in. Tablets are touchscreen devices larger than phones but smaller than laptops, and rely on batteries. Smartphones are small mobile devices that fit in the hand and have integrated technologies like cameras. Servers are dedicated computers that provide services like file storage, printing, and hosting websites to other devices on a network.
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Computer systems
- 1. Types of Computer Systems - desktop systems - mobile devices - servers
- 2. Desktop System ? This is a personal computer designed to be in a stationary position, where all its components fit on or under a desk or table. ? Comprises a box that houses computer components, a monitor, a keyboard, a mouse and other peripherals (printer, scanner etc)
- 3. ADVANTAGES 1. Generally, has more capacity to increase specifications if needed (more memory, faster processor etc) 2. Isn¡¯t easily stolen and generally not as fragile as other devices. 3. Larger screen, keyboard and mouse allows for easier data entry activities (word processing, spreadsheet, email) DISADVANTAGES 1. Not mobile like a tablet or laptop. 2. Uses office space
- 4. Mobile Devices Laptop (notebook) ? This is a thin, lightweight mobile computer with a screen in its lid and a keyboard in its base. ? Can operate on mains power or can be powered using its battery. ADVANTAGES 1. They are mobile 2. They have a larger screen than a tablet and a physical keyboard for easier typing. 3. They can be packed away when not in use.
- 5. DISADVANTAGES 1. They tend to be more fragile than a desktop. 2. They can be stolen easily. 3. Can be difficult to customize (add memory and graphics card. 4. Reliant on battery working if away from power source.
- 6. Tablets ? Usually smaller than a laptop but larger than a phone. ? Contains a touch screen and doesn¡¯t contain a physical keyboard. ? Is reliant on working battery but can be used plugged into power. ADVANTAGES 1. Can be mobile 2. Can be directly connected to internet (SIM Card) 3. Functions can include video and photo options 4. Generally costs less than desktop and laptop.
- 7. DISADVANTAGES No keyboard or mouse, so data entry is slower. Easy to damage Small so easy to steal Restricted software available.
- 8. Smart Phones ? This is a computer device small enough to hold in your hand (screen 3-5 inches). ? Most mobile devices can access network and internet services. ADVANTAGES ? Very mobile ? Access to internet (WiFi and 4G/5G) ? Technologies like camera, GPS and video integrated. DISADVANTAGES ? small screen and keyboard to enter information. ? Has restricted software options.
- 9. Server (computer) ? This is a computer which is dedicated to providing one or more services to other computers or devices on a network. ? Services provided by the server include; - Providing username/password security access - storing and sharing files (File Server) - Providing access to printers and other hardware (Print Server) - Can host websites and other web resources (Web Servers) - Storing and managing emails (Email Server)