presentation on software,hardware and input output devices

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Institute of Geology

Presentation in Honour to Sir Ali AbbasInstitute of CS & ITBy Tabinda Imtiyaz Roll # 30


COMPUTER SCIENCE 1st SEMESTER MORNINGPersonal ComputersDesktop Computers:A computer designed to fit comfortably on top of a desk. These computers are the most common type of single use computer. Normally, they one microprocessor for processing. However, for multiprocessing more microprocessors can be added. There are two famous models of Desktop Computers.Work Stations:These Computers are single use computers used for specialized jobs. Examples: In engineering, in animations, in architecture designing. Notebook:These computers are comparatively small computer than desktop computers. The are portable in nature.Normally, these computers are placed on our laps,Also known as Laptops.

COMPUTER SCIENCE 1st SEMESTER MORNINGPersonal ComputersTablet Computers:These are also portable computers but lighter than notebook computers. They receive input from digital pen or stylus.Hand-held Computers:These are the computers usually held in hand. Some manufacturers are trying to solve the small keyboard problem by replacing the keyboard with an electronic pen. Hand-held computers are also called PDAs, palmtops and pocket computers.Smart Phones:These are the computers including few features or hand-held computer.

COMPUTER SCIENCE 1st SEMESTER MORNINGOrganizational use of ComputerNetwork Server:These are the combination of one or more centralized computer. In these Network Server different users can access different services of the network. Mainframe Computers:Mainframe computers are used in large scale. Like, Schools, banks, universities etc. These are large scale computers. People can access the services using their PCs called Terminal. Mini Computers:These computers are purposed around 1960s and were smaller in size than other computers of that time. Their capacity falls within mainframe and PCs. they are also called mid range computers.

COMPUTER SCIENCE 1st SEMESTER MORNINGOrganizational use of ComputerSuper computers:These computers are considered the best computers . They are used for fulfilling complicated tasks.Like, weather forecasting, nuclear fission.


Tabinda KokabROLL # 08

COMPUTER SCIENCE 1st SEMESTER MORNINGTypes of software:What is Software?A set of instructions, stored digitally within the computers memory, which tells the computer what to do.

There are different categories of software , including system software, utilities and applications software.

COMPUTER SCIENCE 1st SEMESTER MORNINGTypes of Software:System software: Itis the software used to manage and control the hardware components and which allow interaction between the hardware and the other types of software. The most obvious type of system software is the computer'soperating system.Utility software: Itis software such as anti-virus software, firewalls, and so on which helps to maintain and protect the computer system but does not directly interface with the hardware.

COMPUTER SCIENCE 1st SEMESTER MORNINGTypes of SoftwareApplications software:(also known as 'apps') are designed to allow the user of the system complete a specific task or set of tasks. They include programs such as web browsers, office software, games and so on.

Hardware Components of Computer


COMPUTER SCIENCE 1st SEMESTER MORNINGHardware components of systemWhat is Hardware?Thehardwarecomponents of a computer system are the electronic and mechanical parts. The major hardware components of a computer system are:

ProcessorMain memorySecondary memoryInput devicesOutput devices

COMPUTER SCIENCE 1st SEMESTER MORNINGPROCESSORThe processor is the brain of the computer and does all the work.CPU:A central processing unit (CPU), is the hardware within a computer that carries out the instructions of a computer program by performing the basic arithmetical, logical, and input/output operations of the system.

Components of CPU:Two typical components of a CPU are the arithmetic logic unit (ALU), which performs arithmetic and logical operations, and the control unit (CU), which extracts instructions from memory and decodes and executes them.

COMPUTER SCIENCE 1st SEMESTER MORNINGMAIN MEMORYRefers to physical memory that is internal to the computer. The word main is used to distinguish it from external mass storage devices such as disk drives. Another term for main memory is RAM.

The computer can manipulate only data that is in main memory. Therefore, every program you execute and every file you access must be copied from a storage device into main memory. Now, most PCs come with a minimum of 32 megabytes of main memory. You can usually increase the amount of memory by inserting extra memory in the form of chips.

COMPUTER SCIENCE 1st SEMESTER MORNINGSECONDARY MEMORYSecondary memory is used to store program & data for the long period of time. Common secondary storage devices are the hard disk and optical disks.

The hard disk has enormous storage capacity compared to main memory.The hard disk is usually contained inside the case of a computer.The hard disk is used for long-term storage of programs and data.Data and programs on the hard disk are organized into files.Afileis a section of the disk that has a name.

COMPUTER SCIENCE 1st SEMESTER MORNINGINPUT DEVICESIn computing, input devices are any peripheral device, used to enter data, information & control signals into the computer to perform specific tasks. Examples of input devices are keyboards, mouse, scanners, digital cameras and joysticks.

COMPUTER SCIENCE 1st SEMESTER MORNINGOUTPUT DEVICESIn computing, output devices are any peripheral device, used to get output from the computer in useful information or in human-readable form.

Examples: The examples of output devicesare ,Speakers.Headphones.Screen (Monitor). Printer.Projector.Plotter.Television.

KINZA ARSHADRoll # 05Use of excel


COMPUTER SCIENCE 1st SEMESTER MORNINGBy _______ drag the mouse

COMPUTER SCIENCE 1st SEMESTER MORNINGFormula for finding Average

COMPUTER SCIENCE 1st SEMESTER MORNINGBy ________ drag the mouse

THANK YOU !!!!!!!!!!!!!!!!!!!!!