| Experiences from the design of a ubiquitous computing system for the blind Recent countries visiting this post |  |
 | 6 | United States |
 | 1 | |
 | 1 | Russian Federation |
| Experiences from the design of a ubiquitous computing system for the blind Recent countries visiting this post | |
| 6 | United States |
| 1 | |
| 1 | Russian Federation |