They put Linear A in unicode, a language no one speaks anymore in a script we dont know how to decipher. Thankfully, in case we have some Encino Man style shenanigans, some Cretan from 3000 years ago will be able to type and read it and explain what it is exactly that we've decided should be supported in unicode.
Honestly its one of the better things tech bros have done. Unicode seems to be extremely liberal with what it'll include. Its been a bit historically biased (adding fake languages a la klingon before real, actually currently used scripts). But they're at least trying and providing what I hope is real support to linguists and those of us who just like to see how other people do scripts.
Nah, Linear A was a real language written and spoken by thousands of people across hundreds of years. Tengwar is a made up fantasy language by a madlad in England.