What are the top 10 data mining or machine learning algorithms?

Identifying the top 10 algorithms in the abstract is a pretty complicated exercise unless there is a clear dimension to make the comparison. Let me tackle this from a pretty subjective point of view: If I were interviewing you for a Data Mining position what would be the top 10 algorithms I would expect you to know in order of priority? Again, a pretty subjective list, but I think it is quite representative of what you need to do real data mining work in industry.