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A partially disassembled Curta calculator, showing the digit slides and the stepped drum behind them Curta Type I calculator, top view Curta Type I calculator, bottom view. The Curta is a hand-held mechanical calculator designed by Curt Herzstark. [1] It is known for its extremely compact design: a small cylinder that fits in the palm of the hand.
Stanley ceased production of the Odd Jobs in 1935, the Garrett Wade tool company revived the tool in 1996, and currently produces Odd Jobs according to the original Stanley design, in two different sizes. [7] It was also available from Harbor Freight and Rockler. Woodpeckers has produced it as a one time tool twice now. [8]
Digital wallet systems enable the widespread use of digital wallet transactions among various retail vendors in the form of mobile payments systems and digital wallet applications. The M-PESA mobile payments system and microfinancing service has widespread use in Kenya and Tanzania , [ 6 ] while the MasterCard PayPass application has been ...
Chaum published the idea of anonymous electronic money in a 1983 paper; [1] eCash software on the user's local computer stored money in a digital format, cryptographically signed by a bank. The user could spend the digital money at any shop accepting eCash, without having to open an account with the vendor first, or transmitting credit card ...
Mondex is an open-loop implementation of the electronic cash scheme - instead of transactions occurring only in one way, money can be transferred between any Mondex user. A transfer of funds using the Mondex card (dubbed an 'electronic purse') operated through a Mondex-enabled device, and in principle occurred between 2 cards - whether it was 2 ...
Made in Japan, this was also the first calculator to use an LED display, the first hand-held calculator to use a single integrated circuit (then proclaimed as a "calculator on a chip"), the Mostek MK6010, and the first electronic calculator to run off replaceable batteries. Using four AA-size cells the LE-120A measures 4.9 by 2.8 by 0.9 inches ...
A currency-counting machine is a machine that counts money—either stacks of banknotes or loose collections of coins. Counters may be purely mechanical or use electronic components. The machines typically provide a total count of all money, or count off specific batch sizes for wrapping and storage.
Piggy bank (sometimes penny bank or money box) is the traditional name of a coin container normally used by children. The piggy bank is known to collectors as a "still bank" as opposed to the " mechanical banks " popular in the early 20th century.