Bip39 Ozon Despite the fact that it works by using BIP32 process you may still import BIP39 seeds into Electrum wallet. Also besides BIp32 There's BIP44 version which some wallet use for that technology of seeds. Lots of people again up their wallet seed phrases or non-public keys on paper, https://iwanttobookmark.com/story18703284/phrases-with-banana-everything-about-bip39-phrase