The Term "__" Typically Refers To A Compact Disc (Although Other Types Of Media Such As Dvd Or Usb Can Also Be Used To Offer Similar Functionality) With A Fully Operational Bootable Linux Operating System Distribution (The Term Is Also Used With Reference To Other Oss) Which Is Run In The Computer's Memory Thus Eliminating The Need For Its Installation On The Hard Drive. Live Cds Can Be Used As An Os Installation Media - But Also Provide A Convenient Way For Testing A Given Distro Before Installation As Well As Means For Troubleshooting Various Os-related Problems.