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Multiparametric quantum $gl(2)$ algebras are presented according to aclassification based on their corresponding Lie bialgebra structures. Fromthem, the non-relativistic limit leading to quantum harmonic oscillatoralgebras is implemented in the form of generalized Lie bialgebra contractions.Comment: 8 pages, LaTeX; presented by P.P. at the VII-th Colloquium "Quantum  Groups and Integrable Systems", Prague 18-20 June 1998, to be published in  Czech. J. Phy

Quantum harmonic oscillator algebras as non-relativistic limits of multiparametric $gl(2)$ quantizations