Bip39 bitcoin core https://franciscougju442.bravesites.com/entries/general/Produce-Bitcoin-Addresses-from-Seed-Every-Little-Thing-You-Required-to-Know Despite the fact that it takes advantage of BIP32 system you are able to however import BIP39 seeds into Electrum wallet. Also other than BIp32 There's BIP44 Variation which some wallet use to the era of seeds. BIP39 solves this through... https://pixabay.com/users/51089543/