It would be really helpful if contracts could be linked to more than one category or sub-category. A lot of contracts cover multiple areas, so being limited to just one category makes reporting and organisation a bit awkward.
The same goes for suppliers. It would be great if a supplier could be associated with multiple industries and sub-industries, since many suppliers operate across several areas rather than fitting neatly into just one.
Allowing multiple selections here would make it much easier to classify things properly and get more accurate filtering and reporting later on.