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Saturday, January 14, 2012

Different types of Computer (PC, Mobile Computer, Server)

I hope that the last educational series about computer hardware parts was helpful to you. For this post we need to have a look at three of the most common type of computer that we have right now. They are the Personal Computer, Mobile computer and the Network Server. Again this post is informational and educational purpose only. This post is for those who want to educate themselves regarding computer. This post will contain more picture than text because most f the time picture speak louder than words.

The Personal Computer

A personal computer (PC) is any general-purpose computer whose size, capabilities, and original sales price make it useful for individuals, and which is intended to be operated directly by an end-user with no intervening computer operator. In contrast, the batch processing or time-sharing models allowed larger, more expensive minicomputer and mainframe systems to be used by many people, usually at the same time. Large data processing systems require a full-time staff to operate efficiently.

The first developers of IBM PC computers negle...Image via Wikipedia

Computer terminals were used for time sharing ...Image via Wikipedia

Samsung Q1 Ultra UMPCImage via Wikipedia

Amstrad Sinclair PC200 Personal ComputerImage via Wikipedia

 The Mobile Computer Devices

A mobile device (also known as a handheld device, handheld computer or simply handheld) is a small, hand-held computing device, typically having a display screen with touch input and/or a miniature keyboard and less than 2 pounds. Early pocket sized ones were joined in the late 2000s by larger but otherwise similar tablet computers. As in a personal digital assistant (PDA), the input and output are often combined into a touch-screen interface.

Smartphones and PDAs are popular amongst those who wish to use some of the powers of a conventional computer in environments where carrying one would not be practical. Enterprise digital assistants can further extend the available functionality for the business user by offering integrated data capture devices like barcode, RFID and smart card readers.

English: 3Com PalmPilot Professional personal ...Image via Wikipedia

Two Apple mobile devices based on ARM processo...Image via Wikipedia

English: A handheld computer with GPS and GIS ...Image via Wikipedia

Five Mobile SystemsImage by carnero.cc via Flickr

English: A Lenovo X61 tablet laptop shown in t...Image via Wikipedia

Apple MacBook, EeePC, Nintendo DS LiteImage via Wikipedia

English: olpc cgi for version conceptImage via Wikipedia

Fujitsu Lifebook 810U - very small and light (...Image via Wikipedia

Mobile computing' is a form of human–computer interaction by which a computer is expected to be transported during normal usage. Mobile computing has three aspects: mobile communication, mobile hardware, and mobile software. The first aspect addresses communication issues in ad-hoc and infrastructure networks as well as communication properties, protocols, data formats and concrete technologies. The second aspect is on the hardware, e.g., mobile devices or device components. The third aspect deals with the characteristics and requirements of mobile applications.

 The Server type computer

In the context of client-server architecture, a server is a computer program running to serve the requests of other programs, the "clients". Thus, the "server" performs some computational task on behalf of "clients". The clients either run on the same computer or connect through the network.

In most common use, server is a physical computer (a hardware system) dedicated to running one or more such services, to serve the needs of users of the other computers on the network. Depending on the computing service that it offers it could be a database server, file server, mail server, print server, web server, or other.

A typical server Image via Wikipedia

Network Storage Server: VIA NSD7800 (front view)Image by viagallery.com via Flickr

A server used for the My HomeImage via Wikipedia

Servers designed for LinuxImage via Wikipedia

English: Sun Microsystems, 2/120 server and SM...Image via Wikipedia

The term server is used quite broadly in information technology. Despite the many server-branded products available (such as server versions of hardware, software or operating systems), in theory any computerised process that shares a resource to one or more client processes is a server. To illustrate this, take the common example of file sharing. While the existence of files on a machine does not classify it as a server, the mechanism which shares these files to clients by the operating system is the server.

Similarly, consider a web server application. This web server software can be run on any capable computer. For example, while a laptop or personal computer is not typically known as a server, they can in these situations fulfill the role of one, and hence be labelled as one. It is in this case that the machine's purpose as a web server classifies it in general as a server.

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