The classical Bernstein-Nikolskii inequalities of the form ‖𝐷𝑓 ‖ 𝑞 𝒞 𝑝𝑞 ‖𝑓 ‖ 𝑝 for 𝑓 ∈ 𝑌 , give estimates for the 𝑝𝑞-norms of the differential operators 𝐷 on classes 𝑌 of polynomials and entire functions of exponential type. These inequalities play an important role in harmonic analysis, approximation theory and find applications in number theory and metric geometry. Both order inequalities and inequalities with sharp constants are studied. The last case is especially interesting because the extremal functions depend on the geometry of the manifold and this fact helps in solving geometric problems.