Powershell: Input variable prompting a user to select an Organisational Unit from a list

I am writing a powershell script and one of the input variables that I would like to include is for the user to select an OU from a list.
 
Something like;

$OU = Read-Host (but selecting an OU from a list).
 
I hope this makes sense.
 
Thanks for your help.
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the_omnificAsked:
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oBdACommented:
Assuming PS 3.0 or later, you can use Out-GridView as a make-shift dialog.
$OUSelection = @(
	'OU 1'
	'OU 2'
)
$OU = $OUSelection | Out-GridView -Title 'Please select an OU and click OK' -OutputMode Single
"You've selected the following OU: '$($OU)'" | Write-Host

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the_omnificAuthor Commented:
This is great, but is there any way of the script automatically listing all our OU's without listing them all in the section?
oBdACommented:
Sure; start with this:
$OUs = Get-ADOrganizationalUnit -Filter * -Properties Description | Select-Object -Property Name, Description, DistinguishedName
$OU = $OUs | Out-GridView -Title 'Please select an OU and click OK' -OutputMode Single
If (-not $OU) {Exit 1}
"You've selected the following OU: '$($OU.DistinguishedName)'" | Write-Host

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In the first line, you can of course filter further, for example with the -SearchBase or -Filter argument of Get-ADOrganizationalUnit, or by adding a Where-Clause.
the_omnificAuthor Commented:
Excellent.
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