Oxygen-----------------------------------Priestly
Paints-----------------------------------Shalimar
Penicillin-------------------------------Fleming
Phonograph-------------------------------Edison
Phonographic Shorthand-------------------Pitman
Photograph-------------------------------Dauguerre
Principle for lever (S.P.Gravity)--------Archimedes
Phototherapy-----------------------------N.R.Finsen
Positive Electrons-----------------------Anderson
Powerloom--------------------------------Cartwright
Pneumatic Tyre---------------------------Dunlop
Printing for the Blind-------------------Braille
Printing Press---------------------------Caxton
Printing Types -------------------------John Guttenberg
Psycho-analysis--------------------------Dr.Sigmund Freud
Quantum Theory---------------------------Max plank
Radio-activity of Uranium----------------Henry Becquerel
Raman effect-----------------------------C.V.Raman
Radium-----------------------------------Madame Curie
Railway Engine---------------------------Stephenson
Radio transmitter------------------------Alexanderson
Rare Gas---------------------------------Cavandish
Replacing human heart--------------------Christian Barnard
Revolver---------------------------------Colt
Safety Lamp------------------------------Davy
Safety Razor-----------------------------Gillet
Salk Vaccine-----------------------------Salk
Seismograph------------------------------Roberts Mallet
Scientific astronomy---------------------Hippalus
Sewing Machine---------------------------Elias Howe
Sextant ---------------------------------Hadley
Space flying------------------------Braun, Dr.Wernher Von
Steam boat------------------------------Fulton
Steam Engine----------------------------James Watt
Steam Turbine---------------------------Parsons
Spectroscope----------------------------Bunsen
Steel Melting Process-------------------Bessemer
Stethoscope-----------------------------Laennec
Submarine-------------------------------Bushwell
Sulpha Drugs----------------------------Domagk
Theory of Relativity--------------------Einstein
Theory of Evolution---------------------Darwin
Theory of conditioned reflex------------Pavlov
Talkies --------------------------------Lee-de-Frost
Tank------------------------------------Swinton
Telegraphic Code------------------------Samuel Morse
Telephone-------------------------------Graham Bell
Telescope-------------------------------Galileo
Television------------------------------Baird
Thermometer-----------------------------Galileo
Thermos Flasks--------------------------Dewar
T.N.T.----------------------------------llly Brandt
Transistor------------------------------Shockley
Typewriter------------------------------Sholes
Uranium fusion--------------------------Oho Hahn
Uranus (Planet)-------------------------Herschel William
Vaccination-----------------------------Jenner