which is the lightest of the following types of computers?

which is the lightest of the following types of computers?

Different sizes and types of computers have offered different services since the invention of the first computer. Computers can be as large as large buildings and as small as laptops or micro controllers in mobile & embedded systems.

A computer is a machine capable of manipulating symbols. Its main characteristics include:

  • It responds to a set of specific instructions in a clearly defined manner.
  • It can execute a prerecorded set of instructions (a program).
  • It can store large amounts of data quickly and retrieve them quickly.

Computers can perform repetitive and complex tasks quickly, accurately, and reliably. Modern computers can be both electronic and digital. Hardware is the actual machinery (wires and transistors and circuits); software, which contains instructions and data, is hardware. These hardware components are required for all general-purpose computers:

  • The central processing unit (CPU), the heart of a computer, is responsible for executing instructions (“software”) that tell it what to do.
  • Memory (fast, costly, short-term memory: Allows a computer to store data, programs, and intermediate results, at most temporarily.
  • Mass storage device: A slower, cheaper, longer-term memory that allows a computer to keep large amounts of programs and data between jobs. Disk drives and tape drives are common mass storage devices.
  • Input device: A keyboard and mouse are the most common input devices. They allow data and instructions to enter a computer.
  • Output device: A display device, printer, or any other device that allows you to see the output of your computer.

Supercomputer and Mainframe

A supercomputer is one of the most powerful computers available. Supercomputers can be very expensive and used for highly specialized applications that need a lot of math calculations (number crunching). Weather forecasting, for example, requires a supercomputer. Supercomputers can also be used for scientific simulations, animated graphics, fluid dynamic calculations, and nuclear energy research. They can also be used for electronic design and analyze geological data (e.g., Petroleum prospecting. Cray Research is perhaps the most well-known supercomputer manufacturer.

The original meaning of Mainframe was to refer to the cabinet that contained the central processor unit, or “mainframe” for a room-filling Stone Age batch computer. The traditional big iron machines were referred to as “mainframe computers” after the development of smaller “minicomputers” in the 1970s. They eventually became known as mainframes. A Mainframe computer is an expensive and large computer that can simultaneously support hundreds or even thousands of users. A mainframe and a supercomputer are different in that a mainframe can execute multiple programs simultaneously. Mainframes can run more concurrent programs than supercomputers, which makes them more powerful. Supercomputers can execute one program more quickly than mainframes. The manufacturer may want to market their machines differently, so the distinction between minicomputers and mainframes is unclear.


It is a medium-sized computer. The distinction between minicomputers of large size and mainframes has been blurred over the past decade. However, it has become more difficult to distinguish between minicomputers and workstations. A minicomputer can support up to 200 users at once.


This computer is used for engineering applications (CAD/CAM), software development, desktop publishing, and other applications that require moderate computing power and high-quality graphics. Most workstations have a large, high-resolution graphics screen with lots of RAM and built-in networking support. They also come equipped with a graphical user interface. Most workstations have a mass storage device, such as a hard drive. However, a special workstation called a “disk less” workstation does not require a drive. UNIX or Windows NT is the most popular operating system for workstations. Unlike personal computers, most workstations can only be used by one user. Although workstations can be linked together to create a local-area network of computers, they can also be used independently.

N.B. N.B. It could be either a workstation or a personal computer.

Personal computer

A personal computer is a small and relatively affordable computer intended for a single user. Personal computers can be purchased for as little as a few hundred pounds up to more than five thousand pounds. The microprocessor technology allows manufacturers to pack an entire CPU onto one chip. Businesses use personal computers for word processing, accounting, and desktop publishing. They also run spreadsheet and database management software. Personal computers are most commonly used at home for gaming and surfing the Internet.

Today’s world of personal computers is divided into two categories: Apple Macintosh’s (P.C.s) and Apple Macintosh’s (Macintoshes). Personal computers have two main characteristics: single-user systems based on microprocessors. Personal computers are single-user systems. However, it is not uncommon to connect them to create a network. There is a lot of power. The distinction between workstations and personal computers has dissolved at the top end. The Macintosh’s high-end Macintosh models and the P.C. have the same computing power as the low-end workstations from Sun Micro systems and Hewlett-Packard.

III, Personal Computer Types

The size of actual personal computers can generally be classified according to their chassis/case. The case or chassis is the metal frame that provides structural support for electronic parts. Each computer system needs at least one chassis to house its circuit boards and wiring. There are slots to accommodate expansion boards. An expansion chassis is required if you insert different boards than the slots. There are two types of chassis: desktop and tower. However, there are many variations. Portable computers are small enough to be carried. These portable computers can be sub notebook and notebook computers, handheld computers, palmtops, and PDAs.

Model of a tower

This term refers to a computer where the power supply, motherboard, and mass storage devices are stacked in a cabinet. This is different from desktop models containing these components in a smaller box. Tower models have the advantage of being smaller, making it easier to install additional storage devices.

Model for desktop

A computer that can be placed on top of a desk. Usually, the monitor is on top. Tower model computers are taller and more narrow than desktop models. Desktop model computers have three internal mass storage devices due to their form. Sometimes, slimline models are used to describe very small desktop models.

Notebook computer

A very lightweight personal computer. Notebook computers are typically less than 6 pounds and small enough to carry around in a briefcase. The display screen makes a notebook computer different from a personal computer. Flat-panel technologies are a method of making lightweight, non-bulky display screens for notebook computers. Many factors affect the quality of notebook display screens. Modern notebook computers have computing power almost equal to personal computers. They share the same CPUs, memory capacities, and disk drives. All this power is in a small package can be expensive. Notebook computers are twice as expensive as regular-sized computers. Notebook computers are equipped with battery packs that allow you to use them without having to plug them in. The batteries must be charged every few hours.

Laptop computer

A portable, small computer that can be placed on your lap. Laptop computers are often referred to as notebook computers.

Computer Sub notebook

A portable computer that weighs slightly less than a full-sized notebook. Sub notebook computers are typically smaller than full-sized notebook computers but have the same keyboard and screen.

Computers that can be carried in your hand

A small, portable computer that can be carried in one’s hands. Because of their small screens and keyboards, handheld computers are still very convenient to use. Handheld computer that provide personal information manager (PIM) functions are the most popular. These include a calendar and an address book. Manufacturers are working to eliminate the problem of the tiny keyboard by using an electronic pen instead. These pen-based devices, however, rely on handwriting recognition technology, which is still in its infancy. PDAs, palmtops, and pocket computers are all names for handheld computers.


You can carry a small computer in your hand. Although they have a smaller screen than full-size computers (and are therefore less practical), palmtops can still be used for some functions, such as calendars and phone books. Handheld computer, also known as PDAs, are palmtops that input with a pen instead of a keyboard. Most palmtop computers don’t have disk drives due to their small size. Many have PCMCIA slots that allow you to insert modems and disk drives. PDAs, pocket computer, and handheld computers are all known as palmtops.


A personal digital assistant is a handheld device that integrates computing, phone/fax, and networking. A typical PDA functions as a cellular phone and fax sender. It can also be used as an organizer. PDAs, unlike portable computers, are pen-based. They use a stylus to input data rather than a keyboard. They also include handwriting recognition features. Some PDAs are capable of responding to voice input using voice recognition technology. Apple Computer introduced the Newton Message Pad in 1993, a pioneering product in the field of PDA. Several other manufacturers soon followed Apple’s lead and introduced similar products. PDAs have not had much success on the market due to their high prices and limited uses. Many experts believe that PDAs are going to become a common gadget.

PDAs can also be called pocket computers, palmtops, and handheld computers.

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