Czech republic is part of the Schengen Area and you might not need a visa depending on your nationality. For exact details please visit the General Visa Information pages from the Ministry of Foreign Affairs.
Foreign attendees might need an invitation letter in order to obtain a visa to get into Prague.
After you have registered, we can issue you an invitation letter on request. Send an email to firstname.lastname@example.org with a request for a letter. We will arrange to get the required information, which we will put into a letter, print, sign and send to you by postal mail.
The list of countries whose citizens need a visa to enter Czech Republic is here.
It is up to you to determine the requirements and comply with them.
Travel to Prague; Getting to the venue
Netdev 0x13 will be held at Hotel Grandium, Politickych veznu 110 00; located in the center of Prague.
Please use this link to get the group rate.
For more details on getting to Prague, please see the wiki.