UNIVERSITY SLUM-LORD (USL) does business by leasing single-family homes minimizing the upkeep on them, and then renting them to students who attend college in the same city. The paragraphs below describe part of the acquisitions cycle for USL. USL only deals in single-family houses in its home city, never in multiple unit dwellings. All of its "homes away from home" are houses leased from their present owners by USL employees who are called SL-agents. Lease contracts negotiated by these agents always deal with just one house, and the lease contract may last 3-5 years. All houses are in the same city and have unique street addresses. Information on houses is not entered into the database until a lease for them has been contracted, so house data is entered only in the lease contract table. Facts about each house, like lot- size and number-of-bedrooms are recorded here. Data about employees and data about lessors is put into the database as soon as it is known without waiting for any transactions to take place. USL's database also keeps track of the ncighborhoods (in a database table) where they lease the houses. Sample neighborhoods are "Walden," "Pembroke" "the Heights" (few USL houses), and "the Depths" (many USL houses). One of the reasons neighborhood data is stored is for planning the later subleasing of the houses. USL calculates a monthly rental surcharge which depends solely upon its neighborhood designation. These monthly surcharges range from very high (The Heights) to very low (The Depths), but every house has a surcharge associated with it, and all houses in a particular neighborhood will have the same surcharge. Information on neighborhoods is entered into the database as soon as USL determines that a new one exists (such as would happen when on a new subdivision is being built). Many USL lessors own multiple houses which they lease to the company, but each house has only one owner. Payments to owners are not handled by SL-agents, but by cashiers. Cashiers are bonded for security purposes and cashiers never become agents (or vice-versa) and very different employee data is kept for SL-agent than for cashiers, therefore their data is kept in separate database tables. Payments to lessors are done by checks which are drawn from company cash accounts. There are some USL cash accounts from which checks are never written. Checks are also used to discharge other obligations of the company, such as advertising and taxes. When USL signs a lease contracts with a lessor USL immediately gives the lessor a check as a small advance on future lease payments. Thereafter, future lease payments are sent by check sent to lessors on a schedule determined by one of three lease payment options that are negotiated by the agents: (1) each month, (2) every six months, and (3) every year. When multiple lease payments are due to the same lessor during the same month (because USL is leasing more than one property from that person), cashiers simply disburse one check. IN THIS ERD JUST INCLUDE USL'S BUSINESS WITH LESSORS; DO NOT CONSIDER THE LATER SUBLEASING TO STUDENTS.