Serial access is where data records are stored one after the other with no regard to the order. This is usually an unprocessed file.
Serial files are read by starting at the beginning and reading through every record until you find the one that you want. The records are in no particulat order so you need to start of the beginning to make sure you don't miss a record.
Magnetic Tape and disks can be used to store serial files.
Challenge see if you can find out one extra fact on this topic that we haven't already told you
Click on this link: Serial Access