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878 bytes added ,  07:08, 5 June 2010
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File:Custom-abacus.png|custom, as shown: octal (base 8)
 
File:Custom-abacus.png|custom, as shown: octal (base 8)
 
</gallery>
 
</gallery>
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=== The toolbars ===
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<Image:Abacus-main-toolbar.png|left>
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From left to right:
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:project-toolbar button
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:saupan button (Chinese abacus)
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:soroban button (Japanese abacus)
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:schety button (Russian abacus)
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:nepohualtzintzin button (Mayan abacus)
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:binary button (binary abacus)
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:hexadecimal button (hexadecimal abacus)
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:customization-toolbar button
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:stop button not shown
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<Image:Abacus-custom-toolbar.png|left>
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From left to right:
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:select the number of rods
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:select the number of beads on the top of the frame
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:select the number of beads on the bottom of the frame
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:select the multiplication factor of top beads (e.g., on the Chinese abacus, each top bead counts as 5× the value of a bottom bead on the same rod)
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:select the base to determine the value of bottom beads across rods; this is 10 on most conventional abacuses, but 20 on the Mayan abacus and 2 on the binary abacus.
    
== How to use an abacus ==
 
== How to use an abacus ==

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