What Does Sync Mean ?

Sync is the shortest form of Synchronization. Synchronization is the process by which Data Protection Manager (DPM)
transfers data changes from a protected file server to a DPM server. In other word we can say that when we try to Sync then the modified version is copied on the target PC or mobile. And it is a process transfer data when we come under the network.

Sync is short for SYNCHRONIZE which means to occur at the same time or to operate in unison.  It is a common term used today to refer to a PDA or other electronic devices that are "SYNC'd" with computers and each other.

Sync is the short form of Synchronization. In terms of your question it is simple the process of the ipod updating itself to match your pc playlist of music. The ipod should not be removed or unplugged during this short period.

Being in sync is like being one of the same.