Sure, thats easy
Acronym Definition
PB Problem
PB Peanut Butter
PB Pushbutton
PB Plumbum (Latin for the metallic element lead)
PB Polished Brass
PB Packard Bell
PB PunkBuster (gaming anti-cheat project)
PB Point-Blank
PB Playboy (magazine)
PB Publications
PB Paperback (book edition)
PB Pacific Beach (San Diego, California)
PB Personal Best (athletic record)
PB Playback
PB Prison Break (TV Series)
PB Pitney Bowes
PB Para?a (Brazilian state)
PB PowerBook (Macintosh)
PB Powerbuilder (Sybase software development tool)
PB Peripheral Blood
PB Public Bank
PB Played By (roleplay gaming)
PB Power Ball (lottery)
PB Photobucket (online image hosting service)
PB Pit Bull
PB Passed Ball (baseball)
PB Private Banking
PB Power Brakes
PB Pacific Beach (California)
PB Pandora's Box
PB Performance-Based
PB Public Broadcasting
PB Photobook
PB Pot Belly
PB President's Budget
PB Point B
PB Petabyte (1,024 terabytes)
PB Paintbrush
PB Pocket Book
PB Polybutylene
PB Post Box
PB Parts Breakdown
PB Personal Business
PB Presiding Bishop
PB Prussian Blue (ferric ferrocyanide antidote for Cs 137)
PB Particleboard
PB Princess Bride
PB Push-button Switch
PB Private Business
PB Paint Ball
PB Page Break (proofreading; also HTML code)
PB Panera Bread (restaurant)
PB Professional Bookkeeper
PB Pry Bar
PB Performance Bond
PB Points Behind (hockey)
PB Pyridostigmine Bromide
PB Private Brand
PB Printed Board
PB Patrol Boat
PB Parker Brothers (game company)
PB Peptide Bond
PB Particle Beam
PB Penalty Box (hockey)
PB Payback Period
PB Publication Bias
PB Program Block
PB Plate Block
PB Parsons Brinckerhoff, Inc. (engineering firm)
PB Paddington Bear (children's storybook character)
PB Project Book
PB Pull Box
PB Patrol Bomber (US aircraft designation of WW II)
PB Proportional Band
PB Plat Book
PB Pelvic Bone
PB Prime Broker
PB Power Bomb (wrestling move)
PB Paddle Board
PB Phantom Brave (movie, gaming)
PB Page Buffer
PB Property Book
PB Probasin
PB Palladium Books (gaming company)
PB Program Baseline
PB Pulsed Beam
PB Poor Bugger
PB Phonetically Balanced
PB Pepsi Blue (soft drink)
PB Project-Blue (GMod gaming clan)
PB Poly-Butadiene
PB Pool Bottom
PB Pneumatic Brake
PB Plug Board
PB Publications Bulletin
PB Post Boost
PB Pensions Board
PB Primary Branch
PB Personal Base (station)
PB Product Baseline
PB Pass Balanced (Front Page Sports Football '95 et al)
PB Preppy Boy
Pb Probability of Bit Error
PB Plot Bunny (fan fiction)
PB Photon Burst
PB Packet Bus
PB Pulau Bintan (Indonesia)
PB Productive Burp (post surgery)
PB Pax Britannia
PB Probability of Blocking (data transferring)
PB Park Bravo (Turkey)
PB Polar Ball (game)
PB Pharmacopoeia Britannica
PB Phunky ***** (women's group)
PB Privately Baptised (genealogy)
PB Personal Barometer (domestic water consumption calculation application)
PB Pryidostigmine Bromide
PB Pre-Blackout
PB Predicted and Bi-Directional
PB Perkins Bacon, Ltd. (stamp printers, Great Britain)
PB Physical Inventory, Beginning
PB Prefered Bidder (OJEU tendering process)
PB Pro Baddies