• IMP 2.0 came with the first version of Horde, intended as a general web application library.
• This was mostly an organizational improvement.
• Code was moved into more appropriate places, and some of it was reorganized into classes.

However:

• The code was not documented in a meaningful way for developers.
• The code was not internally consistent in any way - naming, structure, etc.
• Horde and IMP were too tightly coupled.