abs() abstract data type activities calendar array bag big integer color histogram color image color map counter counting bag date deque edit buffer expression tree fraction grab bag grayscale image hash map histogram life grid line segment map matrix maze morse code tree multi-array multi-chain -queens board polygon polynomial postfix calculator priority queue queue reversi game logic search tree set sparse life grid sparse matrix stack student file reader student file writer time todo list vector abstraction accessor activation record activities calendar add() addchar() addtosortedlist() adtsee abstract data type advanceby() agent class aggregate method airline ticket counter algorithm algorithm analysis average case best case worst case alias amortized cost ancestors append() - appendterm() array - - - hardware multi-dimensional one-dimensional three-dimensional two-dimensional array class array py array class arrayheap py