Crossword Clue:

Calculator of a kind

Answer	Crossword Clue
ABACUS	Calculator of a kind
ABACUS	Kind of calculator
ABACUS	Ancestor of a calculator

ABACUS	Calculator of a sort
PASCAL	Inventor of a 17th-century calculator
TABULATE	Use a calculator
ADD	Use a calculator
COMPUTE	Use a calculator
ADDS	Uses a calculator
ADDED	Used a calculator
TOTAL	Button on a calculator

PLUS	Key on a calculator
MINUS	Key on a calculator
CLEAR	"C" on a calculator
ADD	Work with a calculator
CLEAR	"C," on a calculator
COS	Key on a scientific calculator
COMPUTE	Determine, as with a calculator
MATH	A calculator assists with it

EXP	Button abbr. on a scientific calculator
ADD	Work with a calculator, in a way
PSAT	It has a 25-min. no-calculator section
EPA	Federal org. with a "personal greenhouse gas emissions calculator"
EEL	Fish whose name is a calculator number turned upside down