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What does B850 stand for?

B850 stands for bands, around 800 and 850

This definition appears rarely

Samples in periodicals archive:

GSM 850 is simply GSM technology operating in the Cellular (850 MHz or "800") frequency band. Both the technology and frequency band have been around for many years, but not until 2002 were they combined. In the U. S. prior to 2002, GSM technology only operated in the PCS (1900 MHz) frequency band. Cellular (850) and PCS (1900) are the two primary bands used for cell phones in the U. S.
" --2. 85=---HF-------------------- the "real shortwave bands"! mobile, fixed, military, ISM, SRD, and. "numbers stations"/more Guide/Newer SGC Guide PDF o AM Broadcasting Tropical bands around 2. 4 MHz (120 metres), 3. 3 MHz (90 metres) and 5 MHz (60 metres) kHz Bands (as used by the BBC) : 3950= - 4000= 75 metres 5900= - 6200= 49 metres +5875 7100= - 7350= 41 metres (7200-7450 from 29.