In PowerShell tabular output, a column header is the displayed label identifying a column. It may differ from the underlying property name because formatting controls width, alignment, and presentation. section 11.2
Treat headers as presentation labels rather than reliable property names. Use Get-Member to discover the actual properties before filtering or comparing objects. section 12.4
Match the property, not the header
Get-Process displays a column labeled PM(MB), but Get-Process | Get-Member identifies the underlying property as PM. Use the property name in PowerShell commands, not the displayed header. section 12.4
Get-Process | Where-Object -FilterScript {$_.WorkingSet -gt 100MB}
This filtering command demonstrates using an object property, WorkingSet, rather than a formatted column label. section 12.4
