The present disclosure relates to a polyimide precursor composition comprising an amic acid ester oligomer of formula (I):

##STR00001##

wherein r, R.sub.x, G, P and R are as defined in the specification. Also, a use of the polyimide precursor composition and a polyimide made from the polyimide precursor composition.

The disclosed technology generally relates to storing data, and more particularly relates to a method of storing data in a polymer, where the data comprises a sequence of bits. In one aspect, the method comprises receiving a sequence of bits to be stored and providing a group of different homo-bifunctional monomers. Each homo-bifunctional monomer comprises a core structure having identical functional groups attached at two different positions of the core structure. The group of different homo-bifunctional monomers comprises homo-bifunctional monomers having at least two different core structures. The method further comprises linking the different homo-bifunctional monomers together to form the polymer having a sequence of monomer core structures representing the sequence of bits to be stored. The different homo-bifunctional monomers are linked together using a click chemistry reaction between the functional groups of the different homo-bifunctional monomers. The present disclosure further relates to a synthesis system for performing the method.