| Extraction of Residual Information in the Microsoft PowerPoint file from the Viewpoint of Digital Forensics considering PerCom E Recent countries visiting this post |  |
 | 3 | United States |
 | 1 | China |
| Extraction of Residual Information in the Microsoft PowerPoint file from the Viewpoint of Digital Forensics considering PerCom E Recent countries visiting this post | |
| 3 | United States |
| 1 | China |