Unit 3- Computer Systems.By George Hurrell

Desktop

• This is a desktop computer, its usually in a fixed position due to its hardrive, desktops are (PC’s) Personal Computers as opposed to laptops or mobile phones. Early desktop computers are designed to lay flat on the desk, while modern towers stand upright. Most modern desktop computers have separate screens and keyboards. Prior to the widespread use of microprocessors, a computer that could fit on a desk was considered remarkably small. Early personal computers, like the IBM PC, were "desktop" machines, with a horizontally-oriented computer case, usually intended to have the display screen placed on top to save space on the desktop. In modern usage the word "desktop" usually refers to tower cases that are in fact more often located on the floor under the desk than on a desk. The tower can consist of the usb slots and CD drives with the graphics and sound cards.

Tablets

• Tablets like the ‘Apple Ipad’ are very popular these days as there unique design with touch-screen technology and compact battery enables them to be portable meaning you can carry them around with out needing a charger. larger than a mobile phone or personal digital assistant, integrated into a flat touch screen and primarily operated by touching the screen rather than using a physical keyboard. It often uses an onscreen virtual keyboard, a passive stylus pen, or a digital pen.

Laptops

• A laptop computer is a personal computer for mobile use. A laptop integrates most of the typical components of a desktop computer, including a display, a keyboard, a pointing device (a touchpad, also known as a trackpad or pointing stick) and speakers into a single unit. A laptop is powered by mains electricity via an AC adapter, and can be used away from an outlet using a rechargeable battery.

• Portable computers, originally monochrome CRT-based and developed into the modern laptops, were originally considered to be a small niche market, mostly for specialized field applications such as the military, accountants and sales representatives. As portable computers became smaller, lighter, cheaper, more powerful and as screens became larger and of better quality, laptops became very widely used for all sorts of purposes, by all sorts of people.

Games Consoles

• A video game console is an interactive entertainment computer or customized computer system that produces a video display signal which can be used with a display device (a television, monitor, etc.) to display a video game. The term "video game console" is used to distinguish a machine designed for people to buy and use primarily for playing video games on a TV. As of 2007, it is estimated that video game consoles have made up 75% of the world's gaming market

Smartphones

• A smartphone is a mobile phone built on a mobile computing platform, with more advanced computing ability and connectivity than a feature phoneThe first smartphones were devices that mainly combined the functions of a personal digital assistant (PDA) and a mobile phone or camera phone. Today's models also serve to combine the functions of portable media players, low-end compact digital cameras, pocket video cameras, and GPS navigation units. Modern smartphones typically also include high-resolution touchscreens, web browsers that can access and properly display standard web pages rather than just mobile-optimized sites, and high-speed data access via Wi-Fi and mobile broadband.