ARPA主机名服务器协议（NAMESERVER）是一种已过时（英语：Obsolete#Technical or functional obsolescence）的用于转换主机名到互联网地址的网络协议。IANA将TCP和UDP的端口42分配用于NAMESERVER；此端口在微软Windows操作系统上更常被WINS使用。
（页面存档备份，存于互联网档案馆）. John Swan; Tomek Krzyzak. "Using FPGAs to avoid microprocessor obsolescence" （页面存档备份，存于互联网档案馆）. 2008 Staff. FPGA processor IP needs to be supported
Bradley, David. The disappearance of the Ugong in Thailand. Investigating Obsolescence. 1989: 33–40. ISBN 9780521324052. doi:10.1017/CBO9780511620997.006.
and Nagel. New York: Garland Pub., 1996. Sarkar, Sahotra. Decline and Obsolescence of Logical Empiricism: Carnap vs. Quine and the Critics. New York: Garland