The truly fun thing for someone working on these systems is each booking is just a flat text file with the line prefix indicating what is on the line. Sometimes

The truly fun thing for someone working on these systems is each booking is just a flat text file with the line prefix indicating what is on the line. Sometimes when we need to implement new features/products we just have to use a generic remark (RX) and kind of coordinate with each other about what it means (or not, which sometimes causes fun when trying to manage interline bookings). Another fun fact is that the booking records are recycled, the frequency of which depends on how many bookings there have been recently. The storage is "infinitely scalable" until the number of seats on planes starts to outgrow the number of bookings that we can hold.