In the US, IBM also greatly simplified its Volume Procurement Amendments and eliminated transport charges for IBM products. The changes cut by more than 50% the number of contracts and supporting documents customers need for typical volume pacts. Customers sign a single contract for all volume purchases, and customers then need sign only a one-page addendum to make volume commitments for one or more products. In addition, the hardware and PC-DOS software groups have been reduced in number from 47 to just seven for commercial customers, who can choose 12, 18 or 24 month terms.