| bytes | Package bytes implements functions for the manipulation of byte slices. |
| debug/elf | Package elf implements access to ELF object files. |
| debug/macho | Package macho implements access to Mach-O object files. |
| debug/pe | Package pe implements access to PE (Microsoft Windows Portable Executable) files. |
| debug/plan9obj | Package plan9obj implements access to Plan 9 a.out object files. |
| encoding/binary | Package binary implements simple translation between numbers and byte sequences and encoding and decoding of varints. |
| errors | Package errors implements functions to manipulate errors. |
| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| internal/saferio | Package saferio provides I/O functions that avoid allocating large amounts of memory unnecessarily. |
| internal/xcoff | Package xcoff implements access to XCOFF (Extended Common Object File Format) files. |
| io | Package io provides basic interfaces to I/O primitives. |
| io/fs | Package fs defines basic interfaces to a file system. |
| os | Package os provides a platform-independent interface to operating system functionality. |
| runtime/debug | Package debug contains facilities for programs to debug themselves while they are running. |
| unsafe | Package unsafe contains operations that step around the type safety of Go programs. |