This Standard Form 33, Solicitation, Offer and Award is the solicitation/contract form used by the federal government, not only to solicit orders, but also to award a contract, since it is a bilateral (two-signature) document.
This means the bidder signs the document and submits it to the government. Then, upon acceptance of the bid, the government signs the same document and a binding contract is established.
This form is used for either sealed bids or negotiated contracts valued at $100,000 or more.
The file is in Adobe Portable Document Format (.pdf), and you will need the free Acrobat Reader to view and print the file.