1-CU- Full form of CU is (Control Unit). It's a component that is used instruct the arithmetic, memory and logic, to ensure the the transfer of data input as well as as output.  ALU- Full form of ALU is (Arithmetic Logic Unit). It's a component that performs all the mathematical and logical activities on binary number system at the center of CPU in the computer. It's located at the heart of every CPU in Computer. MU- Full form of MU is (Memory Unit). It's amount of data unit that can be stored in storage unit. It's two parts. RAM(Random Access Memory)-Random Access memory is super-fast data storage space in computer and it's very fundamental element of computer. It needs to access now and next few moments. ROM(Read Only Memory)- Read only memory is permanently storage medium in the personal computer and other electronic machines. it keeps programming to needed start a PC at boot-up time. It is used to perform essential tasks and holds the instruction of programs and software while operating them in the computer. Software package is a software package is simply multiple applications or code modules that work together to meet various goals and objectives. List of software packages- Word Processing Spread Sheet Presentation Access Database Image Designing Accounting and Mailing etc.