| Index Entry |  Section | 
 
  | 
| T |  |  | 
 | tandem | B.4.2 Installing gawk on a Tandem | 
 | Tcl | 13.1 Naming Library Function Global Variables | 
 | TCP/IP networking | 11.3 Using gawk for Network Programming | 
 | TCP/IP networking | 11.4 Using gawk with BSD Portals | 
 | tee utility | 14.2.5 Duplicating Output into Multiple Files | 
 | tee.awk program | 14.2.5 Duplicating Output into Multiple Files | 
 | terminator, record | 4.1 How Input Is Split into Records | 
 | testbits.awk program | 9.1.6 Using gawk's Bit Manipulation Functions | 
 | Texinfo | 1.2 Typographical Conventions | 
 | Texinfo | Acknowledgments | 
 | Texinfo | 2.2 Data Files for the Examples | 
 | Texinfo | 3.3 Regular Expression Operators | 
 | Texinfo | 3.3 Regular Expression Operators | 
 | Texinfo | 13. A Library of awk Functions | 
 | Texinfo | 14.3.1 Finding Duplicated Words in a Document | 
 | Texinfo | 14.3.7 Extracting Programs from Texinfo Source Files | 
 | Texinfo | B.1.3 Contents of the gawk Distribution | 
 | Texinfo | C.2.1 Adding New Features | 
 | textdomain C library function | 10.2 GNU gettext | 
 | TEXTDOMAIN variable | 7.5.1 Built-in Variables That Control awk | 
 | TEXTDOMAIN variable | 10.3 Internationalizing awk Programs | 
 | time of day | 9.1.5 Using gawk's Timestamp Functions | 
 | timestamps | 9.1.5 Using gawk's Timestamp Functions | 
 | timestamps, converting from dates | 9.1.5 Using gawk's Timestamp Functions | 
 | timestamps, formatted | 13.2.7 Managing the Time of Day | 
 | tmp_number internal function | C.3.1 A Minimal Introduction to gawk Internals | 
 | tmp_string internal function | C.3.1 A Minimal Introduction to gawk Internals | 
 | tolower built-in function | 9.1.3 String Manipulation Functions | 
 | Torvalds, Linus | The GNU Project and This Book | 
 | toupper built-in function | 9.1.3 String Manipulation Functions | 
 | tr utility | 14.3.3 Transliterating Characters | 
 | translate.awk program | 14.3.3 Transliterating Characters | 
 | Trueman, David | History of awk and gawk | 
 | Trueman, David | Acknowledgments | 
 | Trueman, David | A.6 Major Contributors to gawk | 
 | truth values | 6.9 True and False in awk | 
 | two-way I/O | 11.2 Two-Way Communications with Another Process | 
 | type conversion | 6.4 Conversion of Strings and Numbers | 
 | type internal variable | C.3.1 A Minimal Introduction to gawk Internals | 
 | types of variables | 6.7 Assignment Expressions | 
 | types of variables | 6.10 Variable Typing and Comparison Expressions | 
 
  | 
| U |  |  | 
 | undefined functions | 9.2.3 Calling User-Defined Functions | 
 | undocumented features | 12.6 Undocumented Options and Features | 
 | uninitialized variables, as array subscripts | 8.8 Using Uninitialized Variables as Subscripts | 
 | uniq utility | 14.2.6 Printing Non-Duplicated Lines of Text | 
 | uniq.awk program | 14.2.6 Printing Non-Duplicated Lines of Text | 
 | Unix | Glossary | 
 | Unix awk, source code | B.6 Other Freely Available awk Implementations | 
 | unsigned integers | D.2 Data Values in a Computer | 
 | update_ERRNO internal function | C.3.1 A Minimal Introduction to gawk Internals | 
 | use of comments | 2.1.5 Comments in awk Programs | 
 | user information | 13.5 Reading the User Database | 
 | user-defined functions | 9.2 User-Defined Functions | 
 | user-defined variables | 6.3.1 Using Variables in a Program | 
 | uses of awk | Preface | 
 | uses of awk | 2.8 When to Use awk | 
 | uses of gawk | Preface | 
 | using shell variables in awk programs | 7.2 Using Shell Variables in Programs | 
 | using this book | 1.1 Using This Book | 
 | USR1 signal | 11.5 Profiling Your awk Programs | 
 
  | 
| V |  |  | 
 | values of characters as numbers | 13.2.5 Translating Between Characters and Numbers | 
 | values, numeric | D.2 Data Values in a Computer | 
 | values, string | D.2 Data Values in a Computer | 
 | variable shadowing | 9.2.1 Function Definition Syntax | 
 | variable typing | 6.10 Variable Typing and Comparison Expressions | 
 | variable, definition of | D.2 Data Values in a Computer | 
 | variables, user-defined | 6.3.1 Using Variables in a Program | 
 | vname internal variable | C.3.1 A Minimal Introduction to gawk Internals | 
 
  | 
| W |  |  | 
 | w utility | 4.6 Reading Fixed-Width Data | 
 | Wall, Larry | C.4 Probable Future Extensions | 
 | warnings, automatic | Advanced Notes: Backslash Before Regular Characters | 
 | warnings, automatic | 5.7.2 Special Files for Process-Related Information | 
 | warnings, automatic | 5.7.4 Special File Name Caveats | 
 | warnings, automatic | 6.2 Using Regular Expression Constants | 
 | warnings, automatic | 6.2 Using Regular Expression Constants | 
 | warnings, automatic | 9.1.3 String Manipulation Functions | 
 | warnings, automatic | 9.1.4 Input/Output Functions | 
 | warnings, automatic | 12.2 Command-Line Options | 
 | wc utility | 14.2.7 Counting Things | 
 | wc.awk program | 14.2.7 Counting Things | 
 | Weinberger, Peter | History of awk and gawk | 
 | Weinberger, Peter | A.6 Major Contributors to gawk | 
 | while statement | 7.4.2 The while Statement | 
 | Williams, Kent | A.6 Major Contributors to gawk | 
 | Woods, John | A.6 Major Contributors to gawk | 
 | word boundaries, matching | 3.5 gawk-Specific Regexp Operators | 
 | word, regexp definition of | 3.5 gawk-Specific Regexp Operators | 
 | wordfreq.awk program | 14.3.5 Generating Word Usage Counts | 
 
  | 
| X |  |  | 
 | xgettext utility | 10.4.1 Extracting Marked Strings | 
 | XOR bitwise operation | 9.1.6 Using gawk's Bit Manipulation Functions | 
 | xor built-in function | 9.1.6 Using gawk's Bit Manipulation Functions | 
 
  | 
| Z |  |  | 
 | Zaretskii, Eli | Acknowledgments | 
 | zero, negative vs. positive | D.3 Floating-Point Number Caveats | 
 | Zoulas, Christos | A.6 Major Contributors to gawk | 
 
  |