computers, internet and special software
Computers are susceptible to viruses unless they are protected by special software and firewalls.
There are special vacation trips for single seniors. There are special tours both internationally and domestically for single seniors. There is a wide assortment of options for them.
There are many vacation packages for seniors ranging from anything from cruises to special prices on airfare to exotic destinations. It depends on what type of trip you wish to take and the best way would be to search that on the internet.
by using special software found at most computer stores
The kind of technology that can be found in education are computers and printers. The computers would have special software (depending on the class) like Microsoft Office.
It is not possible to use WLAN and LAN connections simultaneously for greater Internet speed without the use of a special router or paid software.
You could use a splitter but if you need to use both at once you will need special software.
If computers are close from each other it's better to use a wireless router or lan switch. If computers are separated with a long distance from each other one of the best methods to share information is using a ftp server (some of them are free and really good).
Yes there are travel agencies that focus on seniors. You can ask someone about that. Even your church may have special trips only for seniors. Check in with your church.
Most modems can work with both macs and pcs without any special software.
No. In order to read data that is deleted, the harddrive would have to be removed and special software would be used to retreive it. If you want to check it out, look on the internet for Forsenic Software or undelete software.