Open source software champions have been influential in excluding software from the scope of patents in the new Patents Bill. Clause 15 of the draft Bill, as reported back from the Commerce Select Committee, lists a number of classes of invention which should not be patentable and includes the sub-clause "a computer program is not a patentable invention." ...Christie and other supporters acknowledge the battle is not won yet. The Bill now goes back to the full Parliament for its second reading.