Drop-Down lists for items, customer names, etc. would improve entry time and accuracy if the field would use search suggest (type a few letters and match in any part of the results) instead of only searching from the beginning. For example:
I have the following products: Cloud Services, Cloud Applications, Cloud Consulting. It would save time if by typing "cons" I already see "Cloud CONSulting" as the only item, instead of typng "cloud" and pick from three options.
Same for customer names, I often forget the last name of my customers (customers show as LAST, FIRST), so I need to open the customer list to search. Search suggest would make it easy to find Mr Joe Doe (listed as Doe, Joe) by just typyng "joe".