Page 27 - Computer Science V2.0 Class 11

Word Processing Software
01
MS Word, Wordpad, Google Docs

Spreadsheet Software
02 Google Sheets, Microsoft Excel, Zoho Sheet

Presentation Software
03 PowerPoint, Zoho PowerPoint, Google Slides

Multimedia Software
04 VLC Media Player, MX Player

Web Browsers Software
05
Google Chrome, Mozilla Firefox, Microsoft Edge

Table 1.2: Examples of General-purpose Application Software

Customised Software

Customised software is designed to meet the requirements of a client according to their business needs. For example,
the software may be developed to analyse the data of a company, keeping in mind specific goals of the company.
Software companies also develop software keeping in mind the general requirements of industry and customise it to
a client's specific requirements. Examples of software in this category are school management, accounting, inventory
control, library management, patient management, and software for online reservations for hotels, airlines, and
railways.

Let's Summarise

Ø Central processing unit is the brain of any computer system.
Ø There are three basic components in the CPU—Arithmetic Logic Unit, Control Unit and Register.

Ø Registers are small data holding areas within CPU that hold data, instructions and memory address during
the processing.

Ø The Arithmetic Logic Unit (ALU) of the CPU performs all arithmetic (+,-,*,/) and logical (>,<,>=,<=,<>)
operations.

Ø The Control Unit (CU) controls the execution of instructions and the flow of data amongst the components of
a computer, i.e., from input devices to memory, memory to ALU and vice versa, and from memory to output
devices.

Ø A microprocessor is a CPU on a single chip. It is built as an integrated circuit (IC), possibly comprising millions
of circuits.

Ø An input device takes input from a user in the form of data or instructions. Some of the commonly used input
devices are Keyboard, Mouse, Scanner, Light Pen, Optical Mark Reader (OMR), etc.
Ø The output devices receive data from a computer and deliver the desired output on a suitable device for a
user. Some of the commonly used output devices are Monitor, Printer, Plotters, etc.
Ø A computer system's memory unit (also called a storage unit) is used to store data and instructions.

Computer Fundamentals 13