### Glossary of Terms

ADIF (Amateur Data Interchange Format) -- A log file format that many logging applications can export. It is not necessary to view or modify ADIF files in order to use TQSL, but for more information, see `http://adif.org.uk` .

Cabrillo -- A log file format used for the submission of contest logs. It is not necessary to view or modify Cabrillo files in order to use TQSL, but for more information, see `http://www.kkn.net/~trey/cabrillo` .

Callsign Certificate -- A unique file issued by the ARRL to a user that is used to digitally sign a log file, thereby confirming its authenticity.

Digital Signature -- A cryptographic means of enabling a sender to convey information to a receiver in a manner that assures the receiver that

- the information comes from the sender
- the information has not been subsequently modified

LoTW users employ the TQSL application to generate a digitally signed log file containing their QSOs for submission to LoTW.

Digital Signed Log File -- A log file that has been digitally signed by TQSL and can be submitted to LoTW.

Log File -- A file containing QSO records in either ADIF or Cabrillo format. Mode Group -- a collection of similar modes. The Phone mode group, for example, includes the modes AM, FM, and SSB. Other mode groups include CW, Data, and Image. Mode groups are defined in TQSL's Configuration Data.

Station Location -- a collection of information specifying a Callsign Certificate and an operating location:

- a DXCC entity
- a State
- a County
- a Grid Square
- a CQ zone
- an ITU zone
- an IOTA Reference Number