The term 'up until' can be expressed in two different ways in a crossword puzzle. The first is 'ERE, ' which is an abbreviation for the phrase 'ERE now, ' meaning 'up to this point.' The second is 'ASOF, ' which stands for 'as of, ' meaning 'up to and including the present time.' Both terms refer to a period of time that has already passed, and are used to indicate that something happened or was true up until a certain point.