1. antivirus scrambles data so it can be sent over the Internet safely 2. cleaners prevents data that violates rules from entering a computer 3. data encryption voices information that appears on the computer screen 4. file compression empties Recycling Bin and removes temporary files 5. file wiping permanently removes files from a computer 6. firewall enables people to control their computers by telling them what to do 7. reader reduces the size of saved data so it can be transmitted more quickly 8. speech recognition scans computers for harmful code