Precision for Discoveries

In the era of searching for new discoveries at LHC, it is crucial to achieve a higher level of precision in understanding the proton structure which it will allow for most unambiguous interpretations of the high energy, luminous data ahead. The knowledge of proton's constituents mainly comes from the deep inelastic scattering data at HERA, complemented by the measurements from the fixed target, Tevatron and, now increasingly precise more data from LHC. A road-map that marks the most recent developments from the past and present experiments sensitive to the proton constituents will be presented here with an emphasis on the current needs to enhance possible signs of new physics beyond Standard Model.