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, -73- logic manuals, flow charts, etc . ), user documentati on ( installation guides, user manuals, training mat erials, release notes, working papers, etc . ), data, reports ( including environmental reports and assessments ), plans, mailing lists, price lists, marketing information a nd procedures, advertising and promotional material s, equipment records, warranty information, architects agreements, construction contracts, drawings, plan s and specifications, records of operations, standard for ms of documents, Tax Returns and related books, rec ords and workpapers, manuals of operations or business proce dures and other similar procedures ( including all d iscs, tapes and other media - storage data containing such information ), in each case whether or not in electr onic form