IMPREST FUND (IL)—A simple, economic purchase method used for small purchases not to exceed 0. The IL is a cash fund for which small payments are made at the time of purchase from a commercial vendor. INTEGRATED LOGISTICS OVERHAUL (ILO)—A concerted effort of assigned shipboard personnel, under the supervision of an ashore- based ILO team, to refine shipboard inventories of repair parts, update related stock records con- sistent with authorized allowances or other stockage objective criteria, and identify material or excess stock. INTEGRATED STOCK LIST (ISL)—A list, prepared as part of the ILO, in NIIN or NICN sequence of all repair parts required to support onboard equipment after the ship has undergone a shipyard overhaul. It is basically the Stock Number Sequence List (SNSL) of storeroom items updated to integrate modified allowances made due to configuration changes accomplished during the overhaul. INTERCHANGEABLE ITEM—A nonequiv- alent item that is used in place of another item in all applications. INVENTORY CONTROL POINTS (ICPs)— The primary support activities of the Naval Supply Systems Command, bureaus, systems commands, and offices that exercise inventory control over specific categories of material. LOGISTICS APPLICATIONS OF AUTO- MATED MARKING AND READING SYM- BOLS (LOGMARS)—A system designed to improve the accuracy and productivity of the receipt and stowage process. It is a system used by SUADPS-RT activities to record incoming transactions by reading bar-code symbols. MAINTENANCE  CODE—Two-position codes used in source, maintenance and recoverability (SM&R) codes with the first position indicating the lowest maintenance level authorized to remove, replace, and use the support item. The second position indicates the maintenance level with the capability to perform complete repair. MATERLAL OBLIGATION—Unfilled quan- tity of a requisition that is not immediately available for issue, but is recorded by the inventory manager or stock point as a commitment for future issue. MATERIAL OBLIGATION VALIDATION (MOV)—A system used to verify the unfilled quantity of a requisition that is not immediately available for issue to the requisitioner, but is recorded as a commitment against existing or prospective stock dues or direct deliveries from vendors. MATERIAL RECEIPT—Gaining possession of an item of Navy property through acceptance of physical custody. MATERIAL SURVEYS—A procedure for determining the cause of gains, losses, or damage to Navy property, establishing personal respon- sibility (if any), and documenting necessary inventory adjustments to stock records. MILITARY ORDINARY MAIL (MOM)— A special procedure approved by the U.S. Postal Service for providing air transportation of official fourth-class mail at a rate considerably cheaper than for priority mail. It may also be used for official second- and third-class mail if considered essential to timely delivery. MISSING, LOST, STOLEN, OR RECOV- ERED (MLSR)—A program that requires the reporting of MLSR property valued at over 0, serialized items valued at over 0, and all losses of arms, ammunition, and explosives coded as sensitive. NATIONAL CODIFICATION BUREAU CODE (NCBC)—A two-digit code included in the fifth and sixth digits of a national stock number (NSN) or a NATO stock number. In an NSN, it identifies the United States as the country that assigned the stock number. In a NATO stock number, it identifies the NATO country that assigned the stock number or indicates that the stock number is used by two or more countries. NAVY ITEM CONTROL NUMBER (NICN)– Items of material that are not included in the Federal Catalog System, but are stocked or monitored in the Navy supply system. NICNs are 13-character identification numbers assigned by ICPs or other Navy item managers for permanent or temporary control of selected non-NSN items under their cognizance. NET UNIT PRICE—Price charged for a DLR when the carcass will be turned in. Net unit price includes repair cost, replacement cost when item is BCM, and a surcharge. AII-4