Sony Corp.'s Betacam SP format is the standard of comparison of video tape recording formats. According to Sony Europe, more than 350,000 Betacam SP devices have been sold world-wide. The majority of broadcast electronic news gathering (ENG) operations currently use Betacam SP camcorders and VTRs. Virtually all broadcast stations require (or at least strongly prefer) Betacam SP source footage. Most clients of professional video production firms specify Betacam SP for industrial shoots and are likely to require videographers to use Sony or Ikegami camcorders.