> There is no way to write a basic program which crashes the calculator without > the use of assembly or an edited backup yes there is This is for the 85 but it replicates and crashes when N is modified or deleted. (10) is the symbol form whe you press 2nd LOG and delete the ^ >> is the black triangle on its side "(10)"->S St>>Eq(S,R) Eq>>St(R,R) St>>Eq(R,T) Eq>>St(T,N) Eq>>St(T,R)