%UCS2, 125, 178
UDATE 28, 97–98
UDAY reserved field name, 28
UMONTH reserved field name, 28
unary operators, 104, 105
unconditional operation codes, 189
/UNDEFINE, 34
UNLOCK, 188, 243, 378–379, 496
CHAIN and, 230–231, 230
cursor positioning after successful operation of, 509
data areas and, 467, 469
*DTAARA and, 378–379
EXCEPT and, 272
READ and, 332–333
READE and, 336
READP and, 338
READPE and, 341
syntax diagram for, 198
unnamed parameter list, 326
%UNS, 125, 178
%UNSH, 125
unsigned integer data type, 13
UPDATE, 86, 188, 380–381, 496, 514, 523–524
CHAIN and, 230–231, 380
cursor positioning after successful operation of, 509
enhanced format calculation specifications in, 530
READ and, 332–333, 380
READE and, 336, 380
READP and, 338, 380
READPE and, 341, 380
syntax diagram for, 199
total time calculations and, 380–381
workstation device file processing and, 518
uppercase
Convert to Uppercase source code, 586
Return as Uppercase String source code, 585
*USA, 191, 298, 307, 572, 574
user entry procedure (UEP), 484
user profiles, USRPRF (User Profile Authority Adoption) in, 553
user-written functions, 477
user-written procedures, 475–476
USROPN keyword, 51, 319, 519
USRPRF (User Profile Authority Adoption) compiler option, 553
UYEAR reserved field name, 28