- usleep
- usprintf
- UStencil
- ustr
- ustrcat
- ustrchr
- ustrcmp
- ustrcpy
- ustrdup
- ustrerror
- ustricmp
- ustrlen
- ustrlwr
- ustrncat
- ustrncmp
- ustrncpy
- ustrnicmp
- ustrpbrk
- ustrrchr
- ustrsize
- ustrsizez
- ustrstr
- ustrtod
- ustrtok
- ustrtok_r
- ustrtol
- ustrupr
- ustrzcat
- ustrzcpy
- ustrzncat
- ustrzncpy
- ustr_const
- usual
- usubBorrow
- uszprintf
- utempter_add_record
- UTF-8
- utf8
- utf8::all
- uthash-dev
- Utility
- Utility_functions
- utility_handlers
- util_atomic
- util_crc
- util_delay
- util_delay_basic
- util_parity
- util_setbaud
- util_twi
- utolower
- utoupper
- uuencode
- uuid
- uuid++
- UUID::Tiny
- uuid_clear
- uuid_compare
- uuid_copy
- uuid_generate
- uuid_is_null
- uuid_parse
- uuid_time
- uuid_unparse
- UVI
- uvsprintf
- uvszprintf
- uwidth
- uwidth_max
- uwildmat
MAN (3)
Library functions, covering in particular the C standard library