Hi List: I've looked at the source code for DateAndTime and TimeStamp but I do not understand it. | t1 t2 | t1 := TimeStamp now. (Delay forMilliseconds: 500 ) wait. t2 := TimeStamp now. (t2 - t1) nanoSeconds. ---> 0 DateAndTime>>clockPrecision says 1 nanosecond. Thanks in advance!