What is a fork?

In the context of Golang, the term "fork" usually refers to creating a copy of a process at the operating system level, as done by the fork system call in Unix-like systems.

However, the standard library in Go does not provide a direct fork call, since Go is oriented towards using goroutines for concurrency rather than process forks.

Generally, a fork is the creation of a child process that is a copy of the parent, including memory and state.

In Go, for parallel work, goroutines and channels are typically used instead of forks. To create new processes, the os/exec package can be used.

Example of launching an external process:

package main

import (
    "os/exec"
    "log"
)

func main() {
    cmd := exec.Command("ls", "-la")
    output, err := cmd.Output()
    if err != nil {
        log.Fatal(err)
    }
    println(string(output))
}

Thus, "fork" in Go is more of a concept from system programming rather than a standard language mechanism.