A method of controlling the unauthorized disclosure of classified data that is used to describe an event that has been calendared in an electronic calendaring application of an interactive information handling system in which the calendar owner assigns a security classification to an event as it is being calendared. The classification as­signed is pre-established by an information security protocol that is either unique to the calendar function or a more comprehensive information security system for the organization. The security classes are pre-established by the system. When the calendar data is presented in a format that allows event descriptions to be readable such as when a day calendar is viewable on the display terminal or in a printed copy, an overall security label is dis­played and printed out when the display is converted to hard copy.

The period covered by the security label generally corre­sponds to the period that is selected for viewing. The security classification displayed is the highest security class of any of the event descriptions that are displayed.

Data structures are established for each calendar entry which store the data in the system. These data structures are scanned to determine the overall classification that is displayed for the day calendar. Since a readable secu­rity classification label is automatically applied, re­gardless of whether the calendar presentation is on the display screen or in hard copy, all of the requirements of the established information security system are met and the electronic calendaring application need not be treated as an exception to the information security system. The method allows each calendar user on the system that has an assigned access permission level to view classified event descriptions at or below his or her assigned security level with a security label automatically displayed or printed.

The present invention deals with a variety of advanced perpetual calendars, combined calendars, multiple calendars, etc., using; a) yearly calendars comprising a minimum of two parts one mobile with respect to the other with one representing the weekdays and another representing the months of the year made in rectangular shape, in circular shape, in tubular shape, etc., b) monthly calendars comprising a minimum of two parts, one mobile with respect to the other with one represent­ing the weekdays and another representing the days of the month, c) weekly/daily calendars displaying the 7 days of the week with the sub-divisions of the days into hours, d) short moon calendars with accommodations for the variable months in it, e) combined calendars joining a Gregorian calendar together with a short moon calendar, f) multi calendars comprising a board support­ing two belts, showing a yearly calendar, a monthly calendar, and a weekly/daily calendar, using numbered weekdays, bypassing the language barrier, displayed on mobile belts, rotated yearly and monthly to adjust the calendars, while the main supporting board shows the twelve months of the year on the yearly calendar and the days of the month on the monthly calendar, g) multi calendars using circular, yearly and monthly calendars provided with pulleys and belts or chains and weights resulting in a mechanised joint calendar accommodating as well, a weekly/daily calendar using, waterproof transparent covering to allow the surface to be marked with water soluble ink and wiped out without affecting the calendar board,with a variety or cursors to pin­point the day and its date and with large displays of the day and its date using the One Letter Alphabet system, resulting in a variety of perpetual calendars, wall calendars, desk calendars, pocket calendars, practical to use and easy to produce.

An image element indicating devie for visually distinguishably indicating only a predetermined image element among a plurality of image elements (12, 13, 14, 15) indicated on an image indicating surface (11) of a sheet (16) from other image elements, comprises electro-­optic element (31, 36) forming each image element and printed on or attached to the image indicating surface of the sheet, the element (31, 36), when being driven by an electric signal, changing between a first optical state to a second optical state which is visually distinguishable from the first optical state, and a drive control circuit (20) for electrically bringing only a single or a plurality of image elements, which are variably determined from among the various image elements, to the second optical state, the drive control circuit (20), conductive wiring lines (27x, 27y) and a power battery (28) being mounted on the sheet (16.)

A calendar utilizes an existing relationship binding together all dates, past and future, in relation to any starting date. The constant relationship between days of the week, months of the year, and numbers enables the user of the calendar without resorting to calculation to find and display any other date not known in advance by simple manipulation of moving components of the calendar. For any given date as a reference point, one may determine, for example, the day of the week of any past or future date without prior knowledge or calculation over the full range of dates encompassed by the calendar.

Die den Monatsdaten entsprechenden Zahlen (1) sind auf einer Platte (12) abgedruckt, die unter dem Deckel (3) eines dreiteiligen zusammenklappbaren Uhrenarmbandverschlußes (3, 8, 10) verschiebbar angeordnet ist. Der Deckel (3) weist einen rechteckigen Ausschnitt (15) auf, in welchem jeweils sieben Reihen von den Zahlen (1) sichtbar sind. Am linken Rand des Ausschnitts (15) sind die Wochentagbezeichnungen (2) abedruckt. Eine aus Kerben (16) der Platte (12) und einem Klötzchen (18) bestehende Rastvorrichtung hält die Platte (12) in der jeweils eingestellten Lage fest. Da die Zahl "1" der Platte (12) gegenüber jede Wochentagbezeichnung (2) durch eine geeignete Verschiebung dieser Platte einstellbar ist, kann der in den Armbandverschluß eingebaute Kalender die Daten des laufenden Monats gegenüber den entsprechenden Wochentagbezeichnungen jederzeit anzeigen.

Slide rule-calendar comprising one fixed part (3), two sliding parts (1, 2) and one cursor (4). On the lower part of the fixed part (3), the thirty-one solar days of the longest month are indicated horizontally. The twelve months of the year are indicated on the left vertical area of the fixed part (3) and also on the cursor (4).

By positioning the two sliding parts (1, 2) on predetermined parameters reported on the top and bottom left of the fixed part (3) which correspond as a pair to a series of equivalent years and by moving the cursor (4) to the desired day, one can single out all the days of the week of the equivalent past and future years corresponding to said pair of parameters, with only one position of the two sliding parts (1, 2) (Figure 1).