* [https://worldofspectrum.net/documentation/ ZX Spectrum documentation]
* [https://sinclair.wiki.zxnet.co.uk Sinclair Wiki]
* [https://www.speccy.org/ Speccy.org] El portal español del Spectrum
* [https://worldofspectrum.net/pub/sinclair/ World of Spectrum file server]
* [https://tzxvault.org/ The TZX Vault]