Page 25 - Computer Science Class 11 With Functions
P. 25

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 Presentation


                                           Multimedia Software
                                      04   VLC Media Player, MX Player



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

                                              Table 1.2: Examples of 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   23
   20   21   22   23   24   25   26   27   28   29   30