Some early efforts have been made to automate conventional
food ordering processes using wireless technology, such as
FIWOS [2], WOS [3], and iMenu[4]. Another PDA-based
wireless food ordering system is by Color by the Bay (CBTB),
Singapore. Using 8 access points, customers at CBTB can
make order via a given PDA from participating restaurants or
pot luck (multiple food hawkers under one management).
These wireless food ordering systems enable customers or
waiters to key in order using mobile devices, namely, personal
digital assistants (PDAs). When a customer or waiter
completes the ordering process, the order details will be sent to
the server from the PDA. The PDAs used by a customer are to
be collected by the waiters to be used by other customers.
PDAs are preferable in the systems implementations because
PDAs are small devices that make them easy to handle and
portable [2-3, 5]. Besides that, with wireless technology,
communication between PDAs and servers can be mad