As far as I can make out Bistec is an Indian company. This company
rebrands (or copies?) calculators by other companies such as Casio. No
idea if this particular calculator is a rebranded one. Reverse image
search came up with various other models with the same key layout but
different housing, such as:
Very peculiar (and probably illegal) how these can use familiar type indicators such as fx-82LB and fx-100D. Could it be a trick to be accepted as a standard high school calculator?
Anyway, the calculator itself is a 10-digit scientific calculator with a load of functions. BASE conversion, statistics and complex number calculations.
©2023 Ernst Mulder