The Word data type is an ordinal integer type, capable of holding positive values starting at zero (0), and up to 65535 only.
It occupies 16 bits of storage - or 2 bytes.
There are some functions such as YearOf where a Word data type is returned.
Declaration: var myvariable : word;
Numbers higher than 65535 will start back at zero (0) at every 65536 - as per the following example.
Please also refer to Integer (Integer, Cardinal, Int64) for additional information.