Aureola crown, modified by an equally simple idea of the emanation of light from the head of a superior being, or by the meteorological phenomenon of a halo. The probability is that all later associations with the symbol refer back to an early astrological origin (compare Mithras), the person so glorified being identified with the sun and represented in the sun's image; so the aureole is the "Hvareno" of Mazdaism. From this early astrological use, the form of "glory" or "nimbus" has been adapted or inherited under new beliefs. A "mandorla" is a vesica piscis shaped aureola which surrounds the figures
RM Nimbus RM Nimbus name. The PC-286 and early PC-386 versions were termed the M Series due to the MCA bus used, and had a similar case design to that used by later models of the PC-186. Later RM PCs using the 386 processor used an ISA bus and were shipped in a particularly ("S" for) slimline desktop case with only two 3.5" drive bays. The processor typically ran at 16 or 25MHz. Later models dropped the "Nimbus" name, although it was still used late enough to appear on some early (and still ISA-based) 486 models shipped in slightly taller (2 x