Sentence:  When an occurrence * * f is isolated during text reading , a <WSD>random</WSD> memory address * * f , the address of a cell in the X-region , is computed from the form of * * f . 
Meaning of the word marked with <WSD> tags:  the most common computer memory which can be used by programs to perform necessary tasks while the computer is on; an integrated circuit memory chip allows information to be stored or accessed in any order and all storage locations are equally accessible