Bip39 https://telegra.ph/Producing-Custom-Bitcoin-Addresses-A-Take-A-Look-At-BIP39-Strategies-06-28 Although it works by using BIP32 process you can still import BIP39 seeds into Electrum wallet. Also besides BIp32 There may be BIP44 Edition which some wallet use for the technology of seeds. Want to check which wallets assistance the BIP39 mnemonic recovery seed phrase? Read the article https://bookmarklinkz.com/story19920468/bip39-mnemonic-to-private-key-the-smart-trick-of-bip39-wallet-that-no-one-is-discussing-https-cutt-ly-uryc5rw7