The AURA Bid Opportunities Web site displays all pending RFB’s, RFP’s, and amendments issued by the AURA Contracts Office for the National Optical Astronomy Observatory, National Solar Observatory, Gemini Observatory and Large Synoptic Survey Telescope. AURA displays, on this Web site, the name and contact information of companies that have attended pre-bid meeting(s). This will apprise prospective subcontractors and the public which firms attended the pre-bid meeting(s). Interested sub-contractors may contact such firms for purposes of supplying subcontract prices. It is the bidder’s obligation to check this Web site to view and obtain copies of amendments and announcements related to the RFB’s.