Sejarah singkat keypad numerik

Tidak ada alasan logis mengapa keypad numerik ponsel dan kalkulator berbeda. Jadi mengapa kita masih menggunakan pola yang sudah mapan hari ini?

Bayangkan keypad numerik telepon dan kalkulator terletak berdampingan. Bisakah Anda melihat perbedaannya tanpa mengeluarkan ponsel cerdas Anda? Jangan khawatir jika Anda tidak dapat mengingat lokasi nomor tersebut. Sebagian besar dari kita sudah terbiasa dengan antarmuka yang akrab sehingga kita tidak memperhatikan urutan angka yang terbalik pada kalkulator. Baris atas kalkulator berisi tombol 7-8-9, sedangkan ponsel menggunakan format 1-2-3.

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• 1642: . 

  
  
  
  
  

• 1822:  

  
  
  
  
  

• 1844: ,  

  
  
  
  
  

• 1857: ,

  
  
  
  
  

• 1874: E. Remington & Sons

  
  
  
  
  

• 1879:

  
  
  
  
  

• 1885: , 9 1

  
  
  
  
  

• 1887:

  
  
  
  
  

• 1887: Model 79

  
  
  
  
  

• 1902: , ( 0)

  
  
  
  
  

• 1914: 10- «3x3+1», .

  
  
  
  
  

• 1919: Western Electric & AT&T

  
  
  
  
  

• 1940: Olivetti Dividisumma

  
  
  
  
  

• 1940: IBM 10 , 1-2-3

  
  
  
  
  

• 1955: AT&T

  
  
  
  
  

• 1963: Bell

  
  
  
  
  

• 1963: Canon

  
  
  
  
  

• 1966: Sharp/Facit

  
  
  
  
  

• 2007: Apple iPhone

  
  
  
  
  

• Bellis, M. (2013). The History of the Computer Keyboard — From an Inventor Perspective. [online] Theinventors.org. Available at: http://theinventors.org/library/inventors/blcomputer_keyboard.htm [Accessed 9 Jun. 2018].

  
  
  
  
  

• Bellis, M. (2018). Who Invented the Cash Register? [online] Thoughtco.com. Available at: https://www.thoughtco.com/cash-register-james-ritty-4070920 [Accessed 9 Jun. 2018].

  
  
  
  
  

• Durant, W. (2011). [1912 Dalton Adding, Listing and Calculating machine]. [online] The Portal to Texas History. Available at: https://texashistory.unt.edu/ark:/67531/metapth969/ [Accessed 9 Jun. 2018].

  
  
  
  
  

• Dalakov, G. (2018). History of Computers, Computing and Internet. [online] Available at: https://history-computer.com [Accessed 9 Jun. 2018].

  
  
  
  
  

• Lutz, M. C., & Chapanis, A. (1955). Expected locations of digits and letters on ten-button keysets. Journal of Applied Psychology, 39(5), 314–317.

  
  
  
  
  

• R. L. Deininger (1960). Human factors engineering studies of the design and use of pushbutton telephone sets. The Bell System Technical Journal, 995–1012.

  
  
  
  
  

• Meehan J. R. (1952). How to Use the Calculator and the Comptometer. Published by Gregg Publishing Division, McGraw-Hill Book Company, Inc., 1–4