| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| golang.org/x/sys/windows/svc | Package svc provides everything required to build Windows service. |
| golang.org/x/sys/windows/svc/debug | Package debug provides facilities to execute svc.Handler on console. |
| golang.org/x/sys/windows/svc/eventlog | Package eventlog implements access to Windows event log. |
| golang.org/x/sys/windows/svc/mgr | Package mgr can be used to manage Windows service programs. |
| log | Package log implements a simple logging package. |
| os | Package os provides a platform-independent interface to operating system functionality. |
| path/filepath | Package filepath implements utility routines for manipulating filename paths in a way compatible with the target operating system-defined file paths. |
| strings | Package strings implements simple functions to manipulate UTF-8 encoded strings. |
| syscall | Package syscall contains an interface to the low-level operating system primitives. |
| time | Package time provides functionality for measuring and displaying time. |