aa b signalinga blank linea d converter or adca displaya file type variablea large number ofa lawa n radio rangea pair of dicea quadranta ray photographya ray protectiona ray spectruma scopea set typea side carriera specified number of timesa station master stationab testabbreviated aabbreviationsabcaberrationabmabnormal glow dischargeabnormal propagationabnormal reflection sporadic reflectionabortaboveabove situationsabrasion resistanceabruptabrupt heterojunctionsabrupt junctionabsabscissaabscissa of absolute convergenceabsoluteabsolute errorabsolute maximum ratingsabsolute perssureabsolute shaft angle optical encoderabsolute stabilityabsolute temperature scaleabsolute unitabsolute valueabsolute zeroabsolutely summableabsorbed dose rate