Table 2.

Usage of query operators and special characters (June 11-May 13).

		Personal computers		Smart device
		QwoR %	QwR %	QwoR %	QwR %
Number of operators
	0	90.08	97.35	90.23	96.53
	>0	9.92	2.65	9.77	3.47
Query operators usage
	AND	78.96	86.53	82.01	85.05
	+	11.24	4.37	6.29	3.08
	OR	6.95	5.20	8.74	6.78
	&	2.63	1.42	2.57	1.28
	Other	0.24	2.49	0.40	3.82
Special characters
	0	89.02	95.66	90.54	96.72
	>0	10.98	4.34	9.46	3.29
Spelling mistake
	0	68.21	87.47	69.07	87.88
	>0	31.80	12.54	30.94	12.12