This relates to the miners that mine cryptocurrency. Halving is a reduction in the reward for using one block. An example is Bitcoin, for which halving takes place every 210,000 blocks.
Modifications or changes to any blockchains, and implementation of new rules incompatible with the previous protocol version.
An offline electronic device that connects to a computer via USB. It is used to store Bitcoins or other cryptocurrencies.
A computer function that encrypts data - resulting in a combination of letters and numbers of a certain length.
The term "HODL" is a misspelling of the English word "HOLD". In the cryptocurrency world, HODL means holding a cryptocurrency under any circumstances while looking at its growth potential over a long-term time scale.