The National Geophysical Data Center (NGDC) offers numerous data sets on diskette or CD-ROM (contact info@mail.ngdc.noaa.gov). The two most extensive on-line databases of solar data are the Space Environment Laboratory (SEL) database and the Solar Terrestrial Dispatch (STD) service. These are comprised mostly of optical data, geophysical and solar indices, flare reports, X-ray activity, and so on. The STD also contains at least one radio datum, the 10.7-cm flux value. For further information, contact D. Speich dspeich@selvax.sel.bldrdoc.gov (SEL) or C. Oler, oler@rho.uleth.ca (STD). Solar Maximum Mission (SMM) data are available from the Space Data Center (SDC) at Rutherford Appleton Laboratoires (RAL, UK), and various NASA solar data sets are available via the NSSDC (§3.1.1.). Data are stored off-line and copied by special request onto disk, to be transferred to a user's home computer. The electronic Newsletter ``SolarNews'' is published monthly and can be subscribed to by sending e-mail to SOLAR (25000) ::EDITOR. The European Physical Society issues the ``European Solar Physics Newsletter'' once or twice per year; contact R. J. Rutten in Utrecht at rutten@ruunsc.fys.ruu.nl or SOLAR::RRUTTEN. ESA issues the ``Solar System News,'' edited partly by the Solar and Heliospheric Division (SHS). Contact A. Pedersen at apederse@estec.bitnet. The Japanese Data Center ``Solar-Terrestrial Environment Laboratory'' (STELAB) issues the ``STEP GBRSC NEWS'' (send subscription requests to gbsrc@stelab.nagoya-u.ac.jp).