First computer with real-time clock?

Tom, I have to disagree with you completely! You are NOT being pedantic! An RTC is indeed any source of information which can be used to monitor the passage if time. It does not need to have any synchronization with "wall time" at all. The RTC may just provide an periodic norification that a certain amount of time has elapsed [16.666mS for a 60Hz LTC] or may have register(s) for accumulating a number of these events. If the processor contains built in timers that can divide a clock signal, then any of these can be considered an RTC. Once any type of RTC exists, a computer can be programmed with a value which matches the current "wall time" and use the information from the RTC to update the wall time. The biggest limitation with the minimal implementation of this is the duration which a a computer may be non-responsive [or even "off"] and still have the ability to correlate the information from an RTC with "wall time". In general LTC's are totally useless for this purpose [you have to manually enter the "base correlation" value at boot]. At the high end, the RTC may accumulate a significant number of "ticks" in hardware [usually with battery backup[ and have the ability to be "preset" in order to correlate with "wall time". In many of these cases the RTC also has decoding circuitary to represent the value in Seconds, Minutes, Hours, Days, etc... At this point the RTC has the functionallity of a "Clock/Calendar". If we are in agreement the the original question really needs to be broken down further... A) What was the first computer to make some use of a periodic signal to keep a time/date that was synchronized with "wall time" [either in hardware or in system software]? Or B) What was the first computer to make use of a device which could remain synchronized to "wall time" even if the computer was not operational?