function out-excel

{param ([string[]]$property,[switch]$raw)

begin {
  # start Excel and open a new workbook
  $Excel = New-Object -Com Excel.Application
  $Excel.visible = $True
  $Excel = $Excel.Workbooks.Add()
  $Sheet = $Excel.Worksheets.Item(1)
  # initialize our row counter and create an empty hashtable
  # which will hold our column headers
  $Row = 1
  $HeaderHash = @{}
}

process {
  if ($_ -eq $null) {return}
  if ($Row -eq 1) {
    # when we see the first object, we need to build our header table
    if (-not $property) {
      # if we haven’t been provided a list of properties,
      # we’ll build one from the object’s properties
      $property=@()
      if ($raw) {
        $_.properties.PropertyNames | %{$property+=@($_)}
      } else {
        $_.PsObject.get_properties() | % {$property += @($_.Name.ToString())}
      }
    }
   $Column = 1
    foreach ($header in $property) {
      # iterate through the property list and load the headers into the first row
      # also build a hash table so we can retrieve the correct column number
      # when we process each object
      $HeaderHash[$header] = $Column
      $Sheet.Cells.Item($Row,$Column) = $header.toupper()
      $Column ++
    }
    # set some formatting values for the first row
    $WorkBook = $Sheet.UsedRange
    $WorkBook.Interior.ColorIndex = 19
    $WorkBook.Font.ColorIndex = 11
    $WorkBook.Font.Bold = $True
    $WorkBook.HorizontalAlignment = -4108
  }
  $Row ++
  foreach ($header in $property) {
    # now for each object we can just enumerate the headers, find the matching property
    # and load the data into the correct cell in the current row.
    # this way we don’t have to worry about missing properties
    # or the “ordering” of the properties
    if ($thisColumn = $HeaderHash[$header]) {
      if ($raw) {
        $Sheet.Cells.Item($Row,$thisColumn) = [string]$_.properties.$header
      } else {
        $Sheet.Cells.Item($Row,$thisColumn) = [string]$_.$header
      }
    }
  }
}

end {
  # now just resize the columns and we’re finished
  if ($Row -gt 1) { [void]$WorkBook.EntireColumn.AutoFit() }
}
}

Get-WmiObject win32_bios -computer (cat c:\servers.txt) | select __server,name,@{label='Release Date';expression={$_.ConvertToDateTime($_.releasedate)}} | out-excel