when was the digital calculator invented

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
when was the digital calculator invented	0.7	0.3	4576	70	40
when	0.72	1	3296	36	4
was	0.33	0.1	3727	33	3
the	1.91	0.4	1841	54	3
digital	0.65	0.5	7252	100	7
calculator	0.28	0.2	1470	30	10
invented	0.42	0.7	2188	30	8

Keyword	CPC	PCC	Volume	Score
when was the digital calculator invented	1.86	0.4	6445	23
who invented the digital calculator	0.12	0.1	7234	89
who invented the first digital calculator	1.09	0.1	6345	29
digital calculator invented	0.15	1	4423	88
when was the calculator invented	0.53	0.5	6561	60
when was the electronic calculator invented	1.67	0.2	2269	1
when was the modern calculator invented	0.4	0.2	2205	77
what year was the calculator invented	0.72	0.9	7808	68
when was the calculator created	0.83	0.8	8206	36
the first digital calculator	1.13	0.5	9906	87
who invented the calculator	0.35	0.9	5947	74
who invented the electronic calculator	0.14	0.7	1944	60
who invented the calculator device	0.58	0.3	9613	81
who invented the calculator we use today	0.35	0.2	1145	54
when was the first digital calculator made	1.55	0.1	2678	16
who invented the modern calculator	1.87	0.7	5054	56