| bytes | Package bytes implements functions for the manipulation of byte slices. |
| flag | Package flag implements command-line flag parsing. |
| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| golang.org/x/text/collate | Package collate contains types for comparing and sorting Unicode strings according to a given collation order. |
| golang.org/x/text/language | Package language implements BCP 47 language tags and related functionality. |
| golang.org/x/text/unicode/norm | Package norm contains types and functions for normalizing Unicode strings. |
| io | Package io provides basic interfaces to I/O primitives. |
| log | Package log implements a simple logging package. |
| math | Package math provides basic constants and mathematical functions. |
| math/rand | Package rand implements pseudo-random number generators. |
| os | Package os provides a platform-independent interface to operating system functionality. |
| runtime/pprof | Package pprof writes runtime profiling data in the format expected by the pprof visualization tool. |
| sort | Package sort provides primitives for sorting slices and user-defined collections. |
| strconv | Package strconv implements conversions to and from string representations of basic data types. |
| strings | Package strings implements simple functions to manipulate UTF-8 encoded strings. |
| text/template | Package template implements data-driven templates for generating textual output. |
| time | Package time provides functionality for measuring and displaying time. |
| unicode | Package unicode provides data and functions to test some properties of Unicode code points. |
| unicode/utf16 | Package utf16 implements encoding and decoding of UTF-16 sequences. |
| unicode/utf8 | Package utf8 implements functions and constants to support text encoded in UTF-8. |