The cache is a temporary storage space on a computer hard drive for web browser to save copies of previously visited Web pages.

An HTTP cookie (also called web cookie, Internet cookie, browser cookie or simply cookie) is a small piece of data sent from a website and stored on the user's computer by the user's web browser while the user isbrowsing

CRC refers to cyclic redundancy code and is a type of checksum algorithm used for ensuring data integrity on systems where accidental or deliberate file changes are possible.