1 Subjects: “...perceived ease of use...”

2 Subjects: “...ease of use...”

3 Subjects: “...perceived ease of use...”

4 “... machine operability and ease of use....”

5 “..., I review the major models and methods, comparing their assumptions, ease of use, and other...”

6 “... and release behavior. Furthermore, the low cost and ease of use of 3DP systems means that the possibility...”