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While the term applet is sometimes used to describe small programs included with a computer's operating system, it usually refers to Java applets, or small applications written in the Java programming language. Unlike ordinary applications, Java applets cannot be run directly by the operating system.
The applet below represents an abacus close to the Russian variant where, for the ease of use, middle counters differ in color from all the rest. Given the advantage of home computers, the applet allows you to select a number system with bases from 2 through 16. Carrying of 1 to the next digit on the left is automatic.hinese suan pan is different from the European abacus in that the board is split into two parts. The lower part contains only five counters on each wire, the upper contains two. Digits from 0 through 4 are represented solely by counters in the lower part. The other five digits need an upper counter.