What Is the “System Volume Information” Folder, and Can I Delete It?

Some gentle help for the inquiring minds of RP:

Today's Tech Term:
ACK

An ACK (short for Acknowledgement Code) is a transmission control character (usually an ASCII character reserved for that purpose) that is sent from a receiving station to a sending station to indicate that a message or block of data has been successfully received (uncorrupted or with an acceptable number of errors).