There are some significant differences – both from a structural and usability perspective – between categories and tags. This article attempts to explain those differences.
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Formally trained in liberal arts and education (I have a B.A. in Government from Harvard and studied Secondary Education at Rutgers Graduate School), I have honed my skills in the communication arts and sciences as a teacher, trainer, instructional designer, writer, photographer, calligrapher, helpdesk manager, database programmer, and multimedia developer.
(I've also been a group counselor, waiter, bartender, bicycle messenger boy, computer salesman, carpenter's helper, financial analyst, and school board president.)
Systems since 1983.
Web sites since 1994.
PHP since 2001.
WordPress since 2007.