 In the early days of the project 's inception , a company named Walnut Creek <unk> , upon the suggestion of the two FreeBSD developers , agreed to release the operating system on CD @-@ ROM . In addition to that , the company employed Jordan Hubbard and David Greenman , ran FreeBSD on its servers , sponsored FreeBSD conferences and published FreeBSD @-@ related books , including The Complete FreeBSD by Greg <unk> . By 1997 , FreeBSD was Walnut Creek 's " most successful product " . The company itself later renamed to The FreeBSD Mall and later <unk> . 
