Note: The information transfer rate may or may not be equal to the transmission modulation rate.
From Federal Standard 1037C in support of MIL-STD-188.
... - 3rd century - 4th century Decades: 190s 200s 210s 220s 230s - 240s - 250s 260s 270s 280s 290s Years: 237 238 239 240 241 - 242 - 243 244 245 246 ...