Decimal computer
（重定向自Decimal Computation）
![IBM 650 front panel with bi-quinary coded decimal displays](/Images/godic/202501/08/IBM-650-panel0354.jpg")
Decimal computers are computers which can represent numbers and addresses in decimal as well as providing instructions to operate on those numbers and addresses directly in decimal, without conversion to a pure binary representation. Some also had a variable wordlength, which enabled operations on numbers with a large number of digits.