definiens: means all documents of, or othe rwise in the possession, custody or control of, or used by, the Sellers in connection with, or relatin g to, the Business, the Acquired Assets, the Assume d Liabilities, or the operations of the Sellers, incl uding all files, instruments, papers, books, microf ilms, photographs, letters, budgets, forecasts, ledgers, journals, title policies, lists of past, present an d / or prospective customers, supplier lists, regulatory filings, tech nical documentation ( design specifications, functio nal requirements, operating instructions, logic manuals, flow charts, etc . ), user documentation ( installat ion guides, user manuals, training materials, release notes, wo rking papers, etc . ), data, reports ( including envir onmental reports and assessments ), plans, mailing lists, pri ce lists, marketing information and procedures, adv ertising and promotional materials, equipment records, warranty information, architects agreements, construction co ntracts, drawings, plans and specifications, records of oper ations, standard forms of documents, Tax Returns an d related books, records and workpapers, manuals of operation s or business procedures and other similar procedur es ( including all discs, tapes and other media - storage data containing such information ), in each case wh ether or not in electronic form