computer system

computer system

1. what is it

   • it is a computer that is electronically programmable data
   • it has to have an input,output,storage and a process
   • structure of a computer system
     • processing
       • input
       • output
       • storage

2. modern computer system

   • examples
     • dab radio
       • this is a computer system
     • wall clock
       • this isn't a computer syatem
     • mp3 player
       • this is a computer system
         • because it has all 4 parts of one
     • toaster
       • this isn't a computer system
         • this isn't a computer system as they don't have all 4 parts
   • they normally have a backup which camn be onsite or offsite
     • example
       • in a school it might burn down and all students work would be gone but they had a backup of site they can store all there data so they don't loose it
   • they also have disk mirroring
     • explain
       • tjis were they mighnt have 2 disks spinning but if one fails the other one which has the excact same data on will carry on
   • hardware sourcing
     • explain
       • this is when they have a list of parts like the spec number which shows you and the company who you have hired what they need and the will cut down the mean time between failure (MTBF)

3. professional standards

   • standards of coding programs
     • examples
       • comment on coding
         • why
           • so when people look at it they know what each section does and so they can do what they want to it
       • variable names and naming conventions
         • why
           • so when people look at it they know what they are looking for when they want to change it and so it is clear
       • formatting code
         • why
           • it is so you can look at it and see what is going on and you do this by adding gaps to your coding