Undo button, 26
undoing, 26
Unicode character sets, defined, 338
Unified Messaging, 284
Uniform Resource Locators (URLs), 338
units of measurement, 304
Unread Mail folder, 160
unread messages
appearance of, 115, 153
cursor changing to indicate, 329
displaying only, 155
marking messages as, 152
updating
meetings, 190
RSS feeds, 246
Search Folders, 160
tasks, liii, liv, 237
URLs (Uniform Resource Locators), 338
USE paragraphs, xxiv
Usenet. See newsgroups
user environment, 30
user folder access, lvi, 262
user input in exercises, formatting of, xxiv
user name
replacing with display name, xli, 9, 82
setting, 302