Task: Text Categorization
Input (English): Three objects known by this term are collectively used to represent spin operators are named after Wolfgang Pauli. Calcium is deposited in an area of bone tissue known by this term, which generally describes any part of tissue that does not contain cells and also describes a part of the mitochondrion where the Krebs Cycle occurs. In mathematics, objects denoted by this term can only be multiplied if the number of columns in the first equals the number of rows in the second. For 10 points, name these rectangular arrays of numbers.
Output (English): Science