OWC Pharmaceutical Research Corp (OWCP)

[Pussim]

Market makers work the otc and the Nasdaq..Specialists work the NYSE to be more specific.
If you watch CNBC for example you'll see individual people running around with paper slips in their hands...these people are specialists...matching buyers with sellers..
ON the Naz and otc..markets makers are firms that electronically trade the shares to ensure an orderly flow in the market.

So that is the difference between market makers and specialists..electronic vs. manual execution.