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2. Visitor pattern - Wikipedia

   en.wikipedia.org/wiki/Visitor_pattern

   The Visitor [1] design pattern is one of the twenty-three well-known Gang of Four design patterns that describe how to solve recurring design problems to design flexible and reusable object-oriented software, that is, objects that are easier to implement, change, test, and reuse.

3. I-20 (form) - Wikipedia

   en.wikipedia.org/wiki/I-20_(form)

   The Form I-20 (also known as the Certificate of Eligibility for Nonimmigrant (F-1) Student Status-For Academic and Language Students) is a United States Department of Homeland Security, specifically ICE and the Student and Exchange Visitor Program (SEVP), document issued by SEVP-certified schools (colleges, universities, and vocational schools) that provides supporting information on a student ...

4. Welcome sign - Wikipedia

   en.wikipedia.org/wiki/Welcome_sign

   A welcome sign is a type of town sign —a sign placed at the entrance to and exit from a city, town, or village. In many jurisdictions, the format of town signs is standardized; in some, welcome signs may be distinct from the legally mandated town sign. A municipality's welcome sign may give its population or date of foundation, list twinned ...

5. Arrival card - Wikipedia

   en.wikipedia.org/wiki/Arrival_card

   U.S. Customs and Border Protection Form 6059B (arrival card) The old Singapore embarkation card, no longer used An arrival card, also known as an incoming passenger card, landing card or disembarkation card, is a legal document used by immigration authorities of many countries to obtain information about an incoming passenger not provided by the passenger's passport (such as health, criminal ...

6. Login - Wikipedia

   en.wikipedia.org/wiki/Login

   Login. In computer security, logging in (or logging on, signing in, or signing on) is the process by which an individual gains access to a computer system or program by identifying and authenticating themselves. The user credentials are typically some form of a username and a password, [1] and these credentials themselves are sometimes referred ...

7. Africa’s richest man says he needs 35 visas to travel in ...

   www.aol.com/news/africa-richest-man-says-needs...

   Nigerian-born Aliko Dangote complains he faces far more hurdles crossing Africa than visitors with ... was forced to give a stool sample in front of an Ethiopian immigration officer, to confirm he ...