Type of Computer families/Classifications
The computer families mean to their produced and functions, at the same time, every computer classifications have given different names for their models and functions. All the classifications of computers have given with its descriptions below:
Personal Computers (PC)
A personal computer 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 large expensive mainframe systems to be used by many people, usually at the same time. I can say a large data processing system require a full-time staff to operate efficiently. E.g.: - Desktop and Tower Top etc.
With large Hard Drives, lots of Memory (RAM), multiple CPU’s running together, does lots of computing depending upon the speed of processors used and memory used.
A computer is with lots of processors, ALUs (Arithmetic logic unit), Memory (RAM), etc. Usually in scientific research work. Capability of 14,000 microcomputers.
A laptop, often called a notebook or "notebook computer", is a small, portable personal computer with a "clamshell" form factor, an alphanumeric keyboard on the lower part of the "clamshell" and a thin LCD or LED computer screen on the upper part, which is opened up to use the computer. Compact and portable version of a PC, Usually in a notebook shape.
A very small computer, usually used in cameras. A microcomputer (sometimes shortened to micro) is a computer with a microprocessor as its central processing unit. Another general characteristic of these computers is that they occupy physically small amounts of space when compared to mainframe and minicomputers.
PDA (Personal Digital Assistant) or Palmtop (IPod or IPad)
A Personal Digital Assistant (PDA) is a handheld computer but has become much more versatile over the years. PDAs are also known as small computers or palmtop computers. PDAs have many uses: calculation, use as a clock and calendar, accessing the Internet, sending and receiving Emails, video recording, typewriting and word processing, used as an address book, making and writing on spreadsheets, scanning barcodes, use as a radio or stereo, playing computer games, recording survey responses, and Global Positioning System (GPS). Newer PDAs also have both color screens and audio capabilities, enabling them to be used as mobile phones (smart phones), web browsers, or portable media players. Many PDAs can access the Internet, intranets or extranets via Wi-Fi, or Wireless Wide-Area Networks (WWANs). Many PDAs employ touch screen technology.
Analog, Digital & Hybrid Computers
We are living in a digital world. Everywhere you will find digital gadgets such as computers, camera, phones, video games. Even household appliances are digital now. Do you know about any analog computer? What is analog computer? Read on to know the difference between analog and digital computers. The analog, digital or hybrid computers mean to understanding of their data processing.
They calculate physical quantities. Example, ammeter and voltage meter etc. They are old, outdated computers. An analog computer is a device that performs computations using continuous physical variables which are analogs of the actual items being computed.
Analog computers might, for example, use the continuous rotation of gears or the angular movements of mechanical or electromechanical parts to perform computations.
That uses binary digits for processing. Example, personal computers. A computer stores data in terms of digits (numbers) and proceeds in discrete steps from one state to the next. The states of a digital computer typically involve binary digits which may take the form of the presence or absence of magnetic markers in a storage medium on-off switches or relays.
In digital computers, even letters, words and whole texts are represented digitally. Unlike analog computers, digital computers can only approximate a continuum by assigning large numbers of digit to a state description and by proceeding in arbitrarily small steps.
They comprise the best of capabilities of digital and analog computers. Hybrid computers are computers that comprise features of analog computers and digital computers. The digital component normally serves as the controller and provides logical operations, while the analog component normally serves as a solver of differential equations.