Forms of Computing Devices ... · PDF fileDifference between computer and calculator ......

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Agenda

� Difference between computer and calculator

� Traditional Classification of Computers

� Forms of Computing Devices

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The term computer can apply to virtually any programmable device that can run variety of software in it.

Before the advent of computers, calculators were the tools that were made use of by the students to do computation while solving math problems.

Modern calculators are electronically powered either by dry cell batteries or solar cells.

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assist him in carrying out calculations involved in math problems.

All computers can be used as calculators. Not all calculators are computers.

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Characteristic Calculator Computer

Definition Calculator is a handheld device used to

perform math operations

A computer is a multipurpose device, which can

also perform complex calculations.

Speed Fast Very Fast

Accuracy Good Very Good

Memory Limited Large Memory

Operation Arithmetic and Logical Arithmetic and Complex programs

Function One at a time So many at the same instant

Programming Limited Extensive

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� Costs hundreds of thousands or even millions of dollars

✁ Composed of multiple high performance computers working in parallel as a

single system

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� Huge computers that could fill an entire room or even a whole floor

� Particularly in large companies to describe the huge machines processing millions of transactions every day.

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� Used by small businesses & firms

� ✁ Midrange Computers✂

� The middle range of the computing spectrum, in between the smallest mainframe computers and the microcomputers

� Less data storage capabilities compared to super-computers & Mainframes

✄ Not designed for a single use

☎ Popular Minicomputers:

✆ K-202

✝ Texas Instrument TI-990

✝ SDS-92

✝ IBM Midrange computers

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� Widely used & the fastest growing computers

✁ Cheapest compared to others

� Specially designed for general usage like entertainment, education and work purposes.

✁ Well known manufacturers of Micro-computer are Dell, Apple, Samsung, Sony & Toshiba.

� E.g. Desktop computers, Gaming consoles, Sound & Navigation system of a car, Netbooks, Notebooks, Palmtop, ✂ ✄ ☎ ✆ ✝ ✞ ✟ ✠ ✡ ☛ ☞ ✌ ✂ ✍ ✆ ✝ ✞ ✎ ✏ ✠ ✑ ✌ ✒ ✓ ✔ ✕ ☞ ✝ ✞ ✍ ✠ ☛ ✖ ✗ ☛ ✠ ✌ ✔ ✑ ✝

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� Wearable PC

✁ Smartphone

� Personal computers: ipads, Laptops, etc.

✁ Desktop computers

� Notebooks - Laptops

� Netbooks

� Personal Digital Assistants (PDAs)

� Workstation

✁ Servers

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� A computer designed for general

use by a single person.

� First known as microcomputers

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� A PC that is not designed for

portability

� set the computer up in a

permanent location

� more power, storage and

versatility for less cost

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� Laptops are portable computers that

integrate the display, keyboard, a

pointing device or trackball,

processor, memory and hard drive all

in a battery-operated package

slightly larger than an average

hardcover book.

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� Ultra-portable computers

✁ Even smaller than traditional laptops

� Extremely cost-effective - cheaper than

almost any brand-new laptop

✁ Internal components are less powerful

than those in regular laptops.

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� Tightly integrated computers

✁ Often use flash memory instead of a

hard drive for storage

� Do not have keyboards but rely

on touchscreen technology

� Smaller than a paperback novel, very

lightweight with a reasonable battery

life

� A slightly larger and heavier version

of the PDA is the handheld computer.

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� A desktop computer that has a more powerful

processor, additional memory and enhanced

capabilities for performing a special group of

task, such as 3D Graphics or game

development.

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� Common computer applications (e-mail, database, multimedia,

calendar/scheduler) are integrated into watches, cell phones,

visors and even clothing

� Computer clothing

✁ Smart watches

� Fabric PCs

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� Mobile phone with more advanced

computing capability and connectivity than

basic feature phones

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� A part of a machine or device

✁ Execute a program that is stored in non-volatile memory

� Operate a specific machine or device

� Operate continuously without being reset or rebooted

✁ Software usually cannot be modified

� E.g. An automobile, a washing machine, a DVD player

� The CPUs used in embedded computers are often sufficient only for the computational requirements of the specific application and may be slower and cheaper than CPUs found in a personal computer.

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