upon Tyne until replaced by 091 in the 1980s), for dramatic use. Common placeholders for postcodes in Canada include A1A 1A1 (a real postal code for Lower Battery Road, St. John's, Newfoundland) and K1A 0B2 (Canada Post Place in Ottawa). H0H 0H0 is reserved by Canada Post for fictional use (specifically for the mythical Santa's workshop). In the United States, the ZIP Code 90210 (from TV series Beverly Hills 90210) is frequently used. Numeric codes with repeated or sequential digits like 12345 (a General Electric plant in Schenectady, New York), or 99999-9999 (unused but in a prefix range for the vicinity of Ketchikan, Alaska) may also appear. 00000, which lies in an unused prefix range, can be used without confusion. In computing, some magic numbers (and other uses of hexadecimal numbers) apply hexspeak to create memorable hexadecimal values. People Joe Bloggs John/Jane Doe Joe Schmoe Tom, Dick and Harry Jane Smith So-and-so What's-their-name or what's-their-face, for a person whose name is momentarily forgotten Examples (declension): what's-their-name, whatstheirname, what's-their-face, whatstheirface, what's-his-face, whatshisface, what's-his-name, whatshisname, what's-her-face, whatsherface, what's-her-name, whatshername Science In chemistry, tentatively discovered or hypothetical elements were assigned provisional names until their existence confirmed. They were created using the prefix eka- . For example, eka-manganese was the placeholder name for technetium, a neighbor of manganese in group 7. See Mendeleev's predicted elements for details. Similarly, the name "unobtainium" is frequently used for a material of highly desired characteristics which does not exist or which would be prohibitively expensive to mine, procure or synthesize. Spoken and written language Lorem ipsum: Simulated text used to fill in for written content in a page layout design See also Expletive attributive Filler Generic you List of placeholder names by language Nonce word Sampo The Thing-Ummy Bob Variable and attribute (research) References Espy, W., An Almanac of Words at Play (Clarkson Potter, 1979) Flexner, S. B. and Wentworth, H., A Dictionary of American Slang; (Macmillan, 1960) Watson, Ian, "Meet John Doe: stand-ins", section 3.7 in IanWatson.org, Cognitive Design, (Ph.D. dissertation, Rutgers University, 2005).