Sort all files into alphanumeric folders based on the first letter of the file name

AlphaSort.ps1

$list = @()
65..90 | ForEach-Object {
  $letter = [char]$_
  New-Item -Path .\ -Name $letter -ItemType "directory"
  move-item .\$letter`?* $letter
  $list += $letter
}

$rest = get-childitem -path .\ -exclude $list
New-Item -Path .\ -Name "0-9" -ItemType "directory"

foreach ($f in $rest) {
  move-item  $f.fullname "0-9"
}