FIDIC

FIDIC : Federation Internationale des Ingenieurs-Counseils (International Federation of Consulting Engineers).
Established in 1913 by Swiss and French Engineers.
FIDIC BOOKS DIVISION BY COLOURS
FIDIC RED BOOK: This is very commonly in use and mainly designed by Employer by assigning authorities to The Engineer (consultant) hired by him.
FIDIC GREEN BOOK: This is short form contract in which normaly no sub contractors or engineers are invoved.
YELLOW BOOK: Contract is based for design, building and engineering works by the contractor but the employer may also involoved some part of design.
FIDIC SILVER BOOK: The contract is for EPC (engineering, procurement and construction) works.

MDB Harmonized Edition
FIDIC red book has been modifed for lenders to give some more protection them is called MDB Harmonized Edition. 
MDB stands for Multilateral Development Banks a group of lenders for development projects.

A FIDIC contract, consist of

1. Contract Agreement;
2. Letter of Tender;
3. Letter of Acceptance;
4. Conditions of Contract;
5. Particular Conditions of Contract (if required)
6. Specifications;
7. Drawings;
8. Schedules;
9. Dispute Adjudication Agreement.