Activity Homepage: http://activities.sugarlabs.org/addon/4293 Sugar Platform: 0.82 - 0.88 Download Now: http://activities.sugarlabs.org/downloads/file/26858/abacus-2.xo Release notes: * Added Mayan (nepohualtzintzin) abacus * Save/restore mode to/from Journal Sugar Labs Activities http://activities.sugarlabs.org