Bip39 hardware https://www.storeboard.com/blogs/ai-for-small-business/browsing-the-globe-of-bitcoin-addresses-the-value-of-bip39/6240727 Although it takes advantage of BIP32 system you can however import BIP39 seeds into Electrum wallet. Also other than BIp32 There is certainly BIP44 Variation which some wallet use to the generation of seeds. BIP39 is like a chance to “study” and full... https://top100bookmark.com/story20975880/bip39-random-word-generator-bip39-converter-an-overview-https-cutt-ly-uryc5rw7