Modular shelving ca be bought in Ikea, or there is an online shop called Fab that sells modular shelving. Ebay and John Lewis are also contenders for modular shelving.

One of the best shelving units for universities is the Action Storage Library Shelving.

It's used in a lot of Universities in the UK, as it is modular it can be designed to fit most spaces.

See link below.

One can purchase affordable modular lounge furniture at stores such as IKEA. IKEA, based in Sweden, offers many affordable furniture purchasing options such as modular chairs, tables, shelving and even bedding that is typically purchased in unassembled packages to keep costs down. The buyers themselves then usually put together the furniture after purchasing it. Another place worth checking out for modular furniture is Overstock and Amazon, too.

There are many types of decorative shelving. There is no limit to the types of available shelving.

Of or pertaining to mode, modulation, module, or modius; as, modular arrangement; modular accent; modular measure.