International Standard Serial Number International Standard Serial Number An International Standard Serial Number (ISSN) is an eight-digit serial number used to uniquely identify a serial publication. The ISSN is especially helpful in distinguishing between serials with the same title. ISSN are used in ordering, cataloging, interlibrary loans, and other practices in connection with serial literature. The ISSN system was first drafted as an International Organization for Standardization (ISO) international standard in 1971 and published as ISO 3297 in 1975. ISO subcommittee TC 46/SC 9 is responsible for maintaining the standard. When a serial with the same content is published in more than one media
Room number often assigned based on the side of the corridor on which the room is located: one side of the corridor has odd-numbered rooms and the opposite side has even-numbered rooms. However, numbers may also proceed in an ascending manner on one side of the corridor before switching to the opposite side to continue doing so on that side. In four digit room numbers, this digit will be represented by the fourth digit instead of the third. Where a room is subdivided, the rooms which are accessed after entry into the primary room number are denoted by appending a letter suffix