If you read the original Scheme report, you'll notice that it's full of example programs, zero of which run on modern Schemes. They're full of operators that Sc

If you read the original Scheme report, you'll notice that it's full of example programs, zero of which run on modern Schemes. They're full of operators that Scheme doesn't have anymore, like BLOCK, PROGN, CATCH, ASET, -$, *$, //$, EVALUATE!UNINTERRUPTIBLY, START!PROCESS, etc.