A flight booking system uses the following algorithm to sort flight data:

# flightDirectory has the format [flightNumber, destination, passengers]

PROCEDURE bubbleSortFlights()
    SET temporary TO []
    FOR outer FROM 0 TO LENGTH(flightDirectory) - 1 DO
        FOR inner FROM 0 TO LENGTH(flightDirectory) - 2 DO
            IF flightDirectory[inner, 2] > flightDirectory[inner + 1, 2] THEN
                SET temporary TO flightDirectory[inner]
                SET flightDirectory[inner] TO flightDirectory[inner + 1]
                SET flightDirectory[inner + 1] TO temporary
            END IF
        END FOR
    END FOR
END PROCEDURE