When was bip39 introduced https://www.demilked.com/author/gobnettlmz/ While it makes use of BIP32 system you are able to even now import BIP39 seeds into Electrum wallet. Also apart from BIp32 There is certainly BIP44 Model which some wallet use with the generation of seeds. BIP39 solves this by utilizing human-readable seed phrases https://www.4shared.com/s/fAf7kF4dLku