| bytes | Package bytes implements functions for the manipulation of byte slices. |
| cmp | Package cmp provides types and functions related to comparing ordered values. |
| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| math/bits | Package bits implements bit counting and manipulation functions for the predeclared unsigned integer types. |
| slices | Package slices defines various functions useful with slices of any type. |
| strings | Package strings implements simple functions to manipulate UTF-8 encoded strings. |