| errors | Package errors implements functions to manipulate errors. |
| golang.org/x/sys/windows | Package windows contains an interface to the low-level operating system primitives. |
| io | Package io provides basic interfaces to I/O primitives. |
| runtime | Package runtime contains operations that interact with Go's runtime system, such as functions to control goroutines. |
| syscall | Package syscall contains an interface to the low-level operating system primitives. |
| time | Package time provides functionality for measuring and displaying time. |
| unicode/utf16 | Package utf16 implements encoding and decoding of UTF-16 sequences. |
| unsafe | Package unsafe contains operations that step around the type safety of Go programs. |