Powershell profile

profile.ps1

function Prompt {
    $loc = Get-Location
    $title = $($loc.Drive.Root)
    ([uri]$loc.Path).segments | Select-Object -Skip 2 | Select-Object -SkipLast 1 | ForEach-Object {
        $title = $title + $_.Substring(0, 1) + "\"
    }
    $leaf = $(Split-Path $loc.Path -Leaf)
    # If the path is just the drive C:\ the leaf = title = C:\
    if ($title -ne $leaf) {
        $title = $title + $leaf
    }
    $Host.UI.RawUI.WindowTitle = $title
    "PS " + $title + "> "
}

Example: Full working directory C:\Users\squaresmile\github\powershell -> C:\U\s\g\powershell.