| bufio | Package bufio implements buffered I/O. It wraps an io.Reader or io.Writer object, creating another object (Reader or Writer) that also implements the interface but provides buffering and some help for textual I/O. |
| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| github.com/buger/goterm | Provides basic bulding blocks for advanced console UI |
| math | Package math provides basic constants and mathematical functions. |
| os | Package os provides a platform-independent interface to operating system functionality. |
| time | Package time provides functionality for measuring and displaying time. |