coding of information. It does this by reading the data directly into core (in forced column binary) without going through the Hollerith interpreter. This means that 12 bits of a computer word instead of 6 are needed to store one column's worth of information. For the CDC6600, five columns of information can be stored in one 60-bit word. Once the information is stored in the computer, the program shifts the 12 bits of information (representing the column of interest) to the low-order 12 positions of the computer word. The 48 high-order bits are masked out and each of the low-order 12 bits can then be interrogated separately. If a bit is found to be on, control is transferred to a table look-up routine. A table (supplied by the user) tells the program what to