a very nice solar powered model. in many ways an
improvement over the el-512, although not
programmable and a solar version of the famous el-506.
the same quality feel as earlier sharp models, entirely solar powered
without batteries, an excellent set of scientific functions and a 10+2 lcd
display. calculations are accurate to 12 figures internally.

featuring two memories, stats, number bases, complex numbers and
solutions to 3 variable linear equations. although stats are 1d, a
surprise was to find normal distribution on offer. *p(t) *is the
normal probability from *-inf *to *x*, whilst* q(t)* and *r(t)*
are variations (0 to x, and x to inf resp).

complex number support was a bit of a let down, *`a*' and *`b*'
keys allow the input and recall of complex numbers, but it appears the
machine can only perform the basic 4 operations with them. even *x^2*,
1/x and *sqrt(x)* did not operate.

the unusual *3-vle* mode is "3 variable linear
equations". the machine prompts for *a1* to *d1*, *a2*
to *d2* and *a3* to *d3* for the equations;

*a1*x + b1*y + c1*z = d1*

a2*x + b2*y + c2*z = d2

a3*x + b3*y + c3*z = d3

upon which the machine solves for *x, y* and *z*, if possible.

having solar power is always neat and it works well even under
artificial lighting. sometimes on startup you have to clear the machine
with the *ca* button because it powers up in an unpredictable state,
but this is true of other solars like the fx-85.