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Index: U

• U (uppercase) characters: Character Classes
• u command (CPAN.pm): Installing Modules with the CPAN Module
• -u file test operator: File Test Operators
• -u option (dprofpp): The Perl Profiler
• uc( ): Function Reference
• ucfirst( ): Function Reference
• $UID ($<) variable: Global Special Variables
• uidl( ) (Net::POP3): Retrieving Email with Net::POP3
• umask( ): Function Reference
• unary operators: Unary Operators
• unbind method (Net::LDAP): Net::LDAP Methods
• uncompress command: Installing on Unix
• uncompressing Perl source code: Standard Perl distribution
• undef( ): Function Reference
• undef value: Variables
• undelete_message( ) (Mail::Folder): Handle Folders with Mail::Folder
• -underline option (widgets): Common Widget Configuration Options
• underscore (_)
• • filehandle: Global Special Filehandles
  • improving number legibility: Numbers
• unescape_from( ) (Mail::Internet): Mail::Internet Reference
• unicode: Unicode
• unique_name( ) (Net::FTP): Net::FTP
• UNIVERSAL module: UNIVERSAL
• Unix-domain sockets: Sockets
• Unix systems
• • #! (shebang) line: The Perl Executable
  • command processing: Command Processing
  • installing Perl on: Installing on Unix
• unless modifier: Modifiers
• unless statement: Conditionals and Loops
• unlink( ): Function Reference
• unmark( ) (News::Newsrc): News::Newsrc Reference
• unmarked_articles( ) (News::Newsrc): News::Newsrc Reference
• unmark_list( ) (News::Newsrc): News::Newsrc Reference
• unmark_range( ) (News::Newsrc): News::Newsrc Reference
• unpack( ): Function Reference
• unpacking Perl source code: Standard Perl distribution
• unpack_sockaddr_in( ) (Socket): Socket Module Functions
• unpack_sockaddr_un( ) (Socket): Socket Module Functions
• Unparsed handler (Expat): Expat Handlers
• unpost( ) (Menu widget): Menu Methods
• unshift( ): Function Reference
• unsub_groups( ) (News::Newsrc): News::Newsrc Reference
• unsubscribe( ) (News::Newsrc): News::Newsrc Reference
• untie( ): Function Reference
• until modifier: Modifiers
• until statement: while loops
• update_message( ) (Mail::Folder): Handle Folders with Mail::Folder
• URI modules: The URI Module
• • URI::Escape: The URI Module
  • URI::Heuristic: The URI Module
  • URI::URL: URI::URL
  • URI::URL module: LWP Overview
• uri( ) (SOAP::Lite): SOAP::Lite
• URIs (Universal Resource Identifiers): LWP Overview
• url( )
• • CGI.pm module: CGI.pm Reference
  • HTTP::Daemon module: HTTP::Daemon
  • HTTP::Request module: HTTP::Request
• urllist parameter, CPAN configuration table: tutorial Support
• URLs (uniform resource locators): General Internet Methods
• • encoding: URL Encoding
  • extra path information: Extra Path Information
  • URI::URL module: LWP Overview
  • • URI::URL
• use directives: Packages,Modules, and Objects
• • Modules
• use_alarm( ) (LWP::UserAgent): LWP::UserAgent
• use_named_parameters( ) (CGI.pm): CGI.pm Reference
• Usenet news: Usenet News
• • Net::News module: Net::NNTP
  • News::Newsrc module: The News::Newsrc Module
• Usenet newsgroups, Perl-related: The comp.lang.perl.* Newsgroups
• use( ): Function Reference
• USER command (POP3): Retrieving Email with Net::POP3
• User::grent module: User::grent
• User::pwent module: User::pwent
• user_agent( ) (CGI.pm): CGI.pm Reference
• UserAgent object: LWP Overview
• • The LWP Modules
  • LWP::UserAgent
• UserAgent( ) (Win32::Internet): General Internet Methods
• UserCreate( ) (Win32::NetAdmin): Win32::NetAdmin
• user_name( ) (CGI.pm): CGI.pm Reference
• Username( ) (Win32::Internet): General Internet Methods
• users, fetching information on: Perl Functions by Category
• use_sleep( ) (LWP::RobotUA): LWP::RobotUA Sections
• utf8 module: utf8
• utime( ): Function Reference