computing

computing

1. memory

   • RAM
     • Random access memory
       • volatile memory
   • ROM
     • read only memory
       • Instructions for how to start up the computer
         • non volatile memory
   • volatile
     • the content is deleted when the computer is turned off
   • non volatile
     • content is saved when computer is turned off but can't be edited

2. secondary storage

   • Magnetic disks
     • Hard drives
     • floppy disks
   • optical disks
     • CDs
     • CDROMs
   • magnetic tapes
     • first form of secondary storage

3. binary

   • list of ones and zeros
     • one equals on
     • zero equals off

4. a byte is 8 bits of storage

   • the binary data is one bit
     • one 1 or 0 in binary equals one bit
       • four is a nibble and eight is a byte