Enumerating, or listing, the objects in a collection in PowerShell does not need a specialized command. For example, if the results of Get-PSDrive were assigned to a variable, enumerating the content of the variable is as simple as writing the variable name and pressing Return:

PS> $drives = Get-PSDrive
$drives
Name     Used (GB) Free (GB) Provider   Root
----     --------- --------- --------   ----
Alias                        Alias 
C           319.37   611.60  FileSystem  C:
Cert                         Certificate  
Env                          Environment 
...

ForEach-Object may be used where something complex needs to be done to each object.

Where-Object may be used to filter results.