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U

uid (user ID), 446–447 Umbrello, 287, 290

UML (Unified Modeling Language), 249, 285, 287, 289

UnicastRemoteObject class, 140

Unicode, 54, 134, 165 UNIX

archive formats, 163, 217

commercial versions, 252

daemon processes, 323

filesystems, 483–485

online manuals, 29

operating system commands, 4 philosophy, 524

as programmer-friendly platform, xxi, 397 releases, 34

shell scripts, 319

standard I/O, 6, 102

tools, 5

user interface, 4

unzip, 27, 299

inspecting files before unzipping, 299

URLEncoder class, 413

URLs, 404–406

parameters in, 412–413, 436

passwords in, 329

useBean element (JSP), 435 USER environment variable, 105 UTF-8 encoding, 134