Bip39 Seed Words. While it uses BIP32 approach you could even now import BIP39 seeds into Electrum wallet. Also other than BIp32 there is BIP44 version which some wallet use for the technology of seeds. The best way to retail store you seed Recuperate phrase is with a Billfodl which https://wiishlist.com/story19183406/private-key-to-seed-phrase-generator-indicators-on-phrases-with-bit-you-should-know