are listed but can vary as an example the following is a list of categories of events numbered 1 17 that are preferably included in the column of events 20 accordingly when a date and the number of days of advanced warning are programmed the type of event corresponding to that date can also be programmed this eliminates the need to write down anything at all by hand and provides an indication of the category of the event at a location within the keyboard display area 14 as fig2 illustrates the base 12 can also be enlarged to include a calendar section 36 that includes a removable sheet 38 exhibiting standard calendar information indicia the indicia can include either preprinted or jotted down information relating to the days of the week and the dates of the particular month shown the dates of the month are within the boundaries of marked areas 40 advantageously there is also provided an area 42 displaying calendar information with regard to the month following the particularly displayed month the sheet 38 has a further defined field 44 in which the name of the displayed month and year are depicted and may include further desired information the removably interchangeable sheet 38 may be provided without the designation of the days of the week appearing at the top line thereof instead this information may be permanently written on the base 12 or even more advantageously it may be depicted on a resilient strip of material which can serve as a clamp for affixing of the periodically changeable sheet 38.