Keyword Analysis & Research: when were modern calculators invented

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
when were modern calculators invented	0.46	0.1	347	75	37
when	0.59	1	3236	23	4
were	0.67	0.2	6494	11	4
modern	0.5	0.5	3091	78	6
calculators	1.25	1	7027	27	11
invented	1.78	0.9	3830	73	8

Keyword	CPC	PCC	Volume	Score
when were modern calculators invented	0.4	0.1	4444	6
when was the first calculator created	0.23	0.1	5768	9
how was the calculator invented	0.84	0.2	4787	95
when was the calculator made	0.18	0.8	3602	43
the history of calculators	1.22	0.3	5680	5
who created the first mechanical calculator	1.01	1	217	50
who created the first calculator	1.14	0.1	6652	45
who created the first handheld calculator	1.44	0.1	2324	69