Hardware Software Hardware: All the physical parts of the computer system (the parts that you can see or touch) Software : Is a collection of programmes that help the compute hardware to work properly.
5 box diagram Backing storage devices. Input device Processor CPU Output devices Main memory RAM & ROM
Backing storage We require backing storage to store programs and files. Without backing storage all our data would be lost when we turn the computer off.
The processor C ontrol U nit, A rithmetic L ogic U nit, R egister CU ALU R
RAM ROM R andom A ccess M emory. This is where information is stored temporarily while the computer is on although this is lost when the computer is switched off! R ead O nly M emory . This is where data and programs are stored permanently.
Different computers palmtop Apple Desktop pc laptop HP