|Here is the sharp compet digital rule.
to the manual:
PC-1802 is a handy type function electronic calculator particularly designed
for the scientific and technical calculations. It is the result of SHARP's
high technical might to combine an ordinary desk-top calculator with a slide
rule into one unit. You can compute 12 types of functions with amazing
accuracy by one touch operation."
early scientific calculator is really a four function calculator with a
memory that the makers have ingeniously added scientific functions. it works
to 8 digits with no internal and cannot represent exponential values meaning
that the numbers are floating with no express exponent.
Nevertheless, a useful set of operations are provided with trigs in degrees
and radians, their inverses, logs and square root. powers are conspicuously
missing although these could be evaluated using logs.
is somewhat lacking with the trigs and logs giving only 6 figures whilst
square root manages 8. however, the trig results are displayed with the last
two digits off so that the otherwise incorrect figures are supressed.
takes 5 (!) AA batteries or can be powered from the optional EL-97 mains