The Dink Network

lol, I had to look it up as well

It can be many things though

Pennsylvania State University
Portland State University (Portland, OR USA)
Power Supply Unit
Plymouth State University (Plymouth, New Hampshire)
Pittsburg State University (Pittsburg, Kansas)
Prince of Songkla University (Thailand)
Polysulfone
Primary Sampling Unit
Public Sector Undertaking (India; state-owned enterprises)
Playstation Underground (game)
Practical Salinity Units
Parti Socialiste Unifié (France)
Port Security Unit
Performance Share Units
Please Shut Up
Prescribing Support Unit (UK)
Prince Sultan University (Riyadh, Saudi Arabia)
Police Support Unit (UK police)
Packet Switching Unit
Pacific States University (Los Angeles, California)
Public Service Unit
Pembroke State University (Lumberton, NC)
Processor Speed Up
Primary Subordinate Unit
Postgonococcal Urethritis
Photo-Synthetic Unit
Professional Standard Unit
Plasma Spray Unit
Pulse Shaping Unit
Pressure Status Unit
The Plastic Surgery Company, Inc. (stock symbol; formerly the symbol for South Puerto Rico Sugar Company)
Pressure Switch Unit
Punjab State University (India)