1

They are freely available.

89.0

2

They can be self-printed and read.

87.2

3

They have interactive features that are not available in printed books (e.g. search functions).

83.5

4

They have features which are in printed books but easier to use in digital version (e.g. hyperlinked table of contents).

78.3

5

Theyhave greater mobility and areconvenientto carry.

77.6

6

They are easily portable and can be read on various reading devices.

76.6

7

They can be downloaded to a personal device and read offline.

75.7

8

They can be read online.

74.3

9

They are easy to use.

70.3

10

They are visually appealing.

58.1