Most European FM[?] broadcasters transmits digital information named Radio Data System (RDS). RDS contain for example clock and broadcast identification.

The following information fields are normally contained in the RDS data - See also (PDF) RDS Features Serving as Tuning Aids (http://www.rds.org.uk/rds98/pdf/RDS_book_sample.pdf):

• AF, Alternate frequencies.
• CT, Clock Time.
• EON, Enhanched Other Networks
• PS Program Service
• PTY, Program Type.
• REG, Regionale links
• RT, Radio Text, Radiotekst.
• TA, TP, Travel announcements
• TMC, Traffic Message Channel. Demands a RDS-TMC decoder.

External addresses

• BBC Corporate Online - TV and Radio Reception - Factsheets (http://www.bbc.co.uk/reception/factsheets/)
• Radio Data System (RDS) PDF (13kb) (http://www.bbc.co.uk/reception/factsheets/docs/radio_rds.pdf)
• Yahoo: rdsforum (http://groups.yahoo.com/group/rdsforum/)

Technical RDS-TMC (External addresses)

• 2.4 RDS-TMC Standards (http://www.rds.org.uk/episode/2_4.htm)
• Traffic Message Channel (TMC) (http://www.rds-tmc.com/)
• (Scroll a little bit down): ADS Announces World's Most Complete RDS/RBDS/MBS Decoder Chip (RDX-1187c) (http://www.datacomm.ch/~hahn/rds.html)
• RDS-TMC Decoder (http://www.gewi.com/data/tic/downloads/downl_main.htm)
• RDS: "The Radio Data System", "The Broadcasters Guide to RDS" (http://www.rds.org.uk/rds98/rdsbooks.htm)
• RDS Features Serving as Tuning Aids (http://www.rds.org.uk/rds98/pdf/RDS_book_sample.pdf)

Technical (External addresses)

• 68hc11 based RDS decoder (http://perso.wanadoo.fr/ybnet/rds.htm), Alternativ adresse (http://membres.lycos.fr/ybnet/rds.htm)
• Carsten Groß: My RDS decoder and homemade computer (http://www.siski.de/~carsten/rds-dekoder-engl.html)
• (16F84 baseret) Hollies RDS decoder (http://users.pandora.be/hollie/picmicro/rds.htm)
• Program Identification decoder (http://mujweb.atlas.cz/www/picode/)
• PI CODES DBASE (http://home.pi.be/~wijnherm/picodes.html)
• FM MEDIA PLAZA (http://www.fmdx.com/)
• European FM Handbook 2002-2003, The Directory of European FM Broadcasting! (http://www.efmh.info/)
• Google: DX and Radio Groups (http://directory.google.com/Top/Recreation/Radio/Shortwave_and_DX_Listening/DX_and_Radio_Groups/)
• RDS (http://www.geocities.com/Broadway/Balcony/5207/rds.html)
• RDS addresses (http://www.howell1964.freeserve.co.uk/MyLinks.htm#RDS)