Another example is Low Density Parity Check Codes [1]. Discovered in 1962 by Robert Gallager but abandoned and forgotten about for decades due to being computat

Another example is Low Density Parity Check Codes [1]. Discovered in 1962 by Robert Gallager but abandoned and forgotten about for decades due to being computationally impractical. It looks like there was a 38 year gap in the literature until rediscovered by David MacKay [2]. The first mainstream use was in 2003. It is now used in WiFi, Ethernet and 5G. [1] https://en.wikipedia.org/wiki/Low-density_parity-check_code https://en.wikipedia.org/wiki/Low-density_parity-check_code [2] https://scholar.google.com/scholar?q=%22low+density+parity+check+codes%22&hl=en&as_sdt=0%2C5&as_ylo=1960&as_yhi=1999 https://scholar.google.com/scholar?q=%22low+density+parity+c...