Worldwide Discounts for Travelers : International Student Identity Card opens doors to thousands of bargains in more than 60 countries.

Full-time students can now obtain the 1993 edition of the International Student Identity Card, the one card that is recognized as proof of student status in more than 60 countries around the world.

Student travelers have never been able to count on discounts while traveling in foreign countries by merely showing the card issued by their individual school. Too many thousands of cards are floating around, making it virtually impossible for attendants at various foreign museums and attractions to determine which cards are real and which are phony.

To help solve the problem, the International Student Travel Conference, which is an umbrella organization representing a worldwide network of student and youth travel bureaus, created the ISIC more than two decades ago.

The participating student and youth travel bureaus (many of which are linked to national student associations) have arranged for the card to be honored for discounts on a variety of services in their countries.

Student discounts are available for air, rail and bus transportation, museums, sightseeing tours and accommodations.

In years past, card buyers have been given a directory listing sample discounts in the participating foreign countries. This year, a booklet lists helpful information on each of the participating countries, such as the cost of transport from the airport, the number of youth hostels in that country, airport departure taxes, and a listing of the offices of the participating student and youth travel bureaus. Specific information on discounts would be available at the offices listed.

Here’s an example of the types of discounts that have been offered recently to card holders.

* A 10% discount on ferries and trains in Turkey.

* Up to a 50% discount on ferries from Great Britain to the European continent.

* 50% off rail fares in Egypt, Ireland and Portugal.

* 50% off bus services in Ireland and Venezuela.

* Free admission to 30 museums and palaces in Portugal.

* Student rates on standby tickets for Dublin and London theaters.

* Up to a 25% discount on ferries from Greece to Mediterranean ports.

* Discounts on rafting, snorkeling and jungle trips in Costa Rica.

In recent years, Hong Kong has offered more than 1,200 types of discounts, and Britain more than 18,000. In Canada, more than 4,000 deals are available, and participating Travel CUTS (formerly the Canadian University Travel Service) offices distribute information on them in three regional guides.

Best bet is to always present your card, even if a reduction in price isn’t actually indicated.

Participating student and youth travel bureaus should also be able to help travelers arrange domestic and international trip itineraries.

For example, many of the participating travel bureaus can provide information on, and sell passes for, Eurotrain, a service similar to Eurailpass. Unlike Eurailpass, which offers flexibility to travel in any direction, Eurotrain operates with point-to-point rail fares available to any traveler under the age of 26. It offers reductions on travel of up to 30%, and allows travelers up to two months to complete their trip.

Unlike Eurailpass, which must be purchased outside of Europe, Eurotrain tickets are available only in Europe. They can be used to link any European gateway city with more than 2,000 destinations in 22 European countries and Morocco.

The ISIC is valid for the calendar year. Those now being sold will be honored until December, 1993.

The 1993 ISIC costs $15. Applications must be accompanied by proof of full-time student status and a passport-sized photograph. For details, contact your local student travel agency or or other travel agent.