Abstract: A programmable calculator is disclosed which has a plurality of keys each having a unique definition as an input key for introduction of instruction statements and constants through associated definition instructions. In the calculator, instruction definable keys each allow a definition instruction distinguishable from the first named definition instructions to be programmed. Each keys specific definition is defined by input keys which introduce different pieces of information as by depression of a conventional shift key. The information is introduced by the user to define the definable keys to perform desired instructions.

Abstract: A method for recording digital information on a recording medium immediately after a silence interval is disclosed. A signal sound of a predetermined level is recorded at the beginning of the digital information stored on the recording medium. Preferably, a silence interval is placed between the signal sound of the predetermined level and the beginning of the digital information.

Abstract: A character printing system in an electronic data processing apparatus is provided that is adapted for printing language characters in response to numerical value coded data entered through numeral keys of a keyboard, each character being represented by a respective numerical value coded data of a predetermined convention, wherein said language characters comprises at least two kinds of language characters, such as upper case type alphabet characters and lower case type alphabet characters, or English alphabet characters and Japanese kana characters, or the like, and the keyboard includes language character code entry mode key and language character kind specifying key as well as numeral keys and ordinary commanding keys, and a printer operable responsive to a storage for storing information entered through said keyboard is controlled by a print control responsive to said storage, whereby said printer is controlled to selectively print numerical value coded data in a kind of language characters specified by t

Abstract: A memory clear method useful to clear a plurality of words contained in a memory from a specific address to an address at the same time. An address register is provided for this purpose. In one preferred form, the address register is responsive to a CX key indicating a memory clear operation, a , key indicating start of the memory clear operation and 0 to 9 digit keys identifying a memory address for the memory clear operation.

Abstract: The modification is effective for use in an electronic taximeter through its ability to electrically compensate for variations in distance traveled per a predetermined number of degrees of revolutions of wheels of a vehicle in accordance with different makes and models of the vehicle. In one of the preferred forms wherein the taximeter electronics comprises means for producing only one set of electric pulses corresponding to distance traveled for the purpose of performing tariff calculations, the modification scheme provides respective one of binary-coded compensation signals dependent upon unique distance traveled per a predetermined number of degrees of the wheel revolutions of the vehicle on which the taximeter is installed, during calculation. In another form wherein the electronics comprising two sets of electric pulses corresponding to distance traveled and time of hire, although the distance pulses are subject to distance compensation, the compensation procedure is inhibited on the time pulses.