Why is human genome project called a mega project ?

Explanation

HGP is a mega project involving a lot of money, most advanced techniques, numerous computers and scientists at work. The magnitude of the project can be imagined that if the cost of sequencing a bp is 3 dollars, sequencing of 3 x 109 bp would be 9 billion dollars. If the data is to be stored in books, with each book having 1000 pages and each page with 1000 letters, some 3300 books will be required. Here bio-informatics data basing and other high speed computational devices have helped in analysis, storage and retrieval of information.