Get-ResourceTypeAbbreviation.ps1

function Get-ResourceTypeAbbreviation {
    param(
        [Parameter(Mandatory=$true)]
        [string]$ResourceType
    )

    if ($tableData.Resource -contains $ResourceType) {
        
        $Answer = $tableData | Where-Object Resource -like $ResourceType | Select-Object -ExpandProperty Abbreviation
        Write-Host "Correct abbreviation for $ResourceType is: $Answer"
    
    } elseif ($tableData.Namespace -contains $ResourceType) {
    
        $Answer = $tableData | Where-Object Namespace -like $ResourceType | Select-Object -ExpandProperty Abbreviation
        Write-Host "Correct abbreviation for $ResourceType is: $Answer"
    
    } else { 
        throw "Unknown resource type: $ResourceType"
    }
}

#Examples:
#Get-ResourceTypeAbbreviation -ResourceType "Virtual Machine"
#Get-ResourceTypeAbbreviation -ResourceType "Microsoft.Compute/virtualMachines"