| bytes | Package bytes implements functions for the manipulation of byte slices. |
| context | Package context defines the Context type, which carries deadlines, cancellation signals, and other request-scoped values across API boundaries and between processes. |
| crypto/md5 | Package md5 implements the MD5 hash algorithm as defined in RFC 1321. |
| errors | Package errors implements functions to manipulate errors. |
| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| gocloud.dev/blob | Package blob provides an easy and portable way to interact with blobs within a storage location. |
| gocloud.dev/blob/driver | Package driver defines interfaces to be implemented by blob drivers, which will be used by the blob package to interact with the underlying services. |
| gocloud.dev/gcerrors | Package gcerrors provides support for getting error codes from errors returned by Go CDK APIs. |
| hash | Package hash provides interfaces for hash functions. |
| io | Package io provides basic interfaces to I/O primitives. |
| net/url | Package url parses URLs and implements query escaping. |
| sort | Package sort provides primitives for sorting slices and user-defined collections. |
| strings | Package strings implements simple functions to manipulate UTF-8 encoded strings. |
| sync | Package sync provides basic synchronization primitives such as mutual exclusion locks. |
| time | Package time provides functionality for measuring and displaying time. |