A survey of properties of vector-valued differential forms, followed by a sketch of their role in Lie algebroids.

• Lecture notes
• A related preprint is available in DVI or PostScript format.
• A reprint of another closely-related paper from the Proceedings of the 6th International Conference on Differential Geometry and Applications in Brno is available in Postscript or DVI format (two figures are not visible in the DVI version).

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