More on late bids. Remember last time when GAO said okay to consider a bid received after bid opening time? Well in O.S. Systems, Inc., the GAO denied a protest and upheld the CO's rejection of a late bid. GAO found that: "Nevertheless, even in cases where the late receipt may have been caused, in part, by erroneous government action, a late proposal should not be considered if the offeror significantly contributed to the late receipt by not acting reasonably in fulfilling its responsibility to deliver a hand-carried proposal to the proper place by the proper time."