What does ">>" mean in powershell 2.0?

I entered the command

Set-OABVirtualDirectory <CAS2010>\OAB* -ExternalUrl "https://mail.contoso.com/OAB"

and got >>

Then I entered a simple.    Get-Eventlog system -newest 100 | where {$_.eventid -eq 20}

and got >>

lejon