English to Spanish Bus/Financial Construction / Civil Engineering Project Management

This is from a list of unrelated items, which I copy just in case:

- Time sheet
- Meeting report
- Facsimile
- Memorandum and follower
- Purchase order - Standard terms and conditions
- Invitation to tender - Consulting services only

My own guess is "memorandum y copia de seguimiento". But that would be an almost archeological specimen, wouldn't it?

Any ideas?