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A legislation that seeks to push for a merit-based immigration system and increase the allotment of green cards by 45 per cent annually has been introduced in the US House of Representatives and may benefit Indian techies if signed into law. Backed by the Trump administration, the legislation 'Securing America's Future Act' if passed by Congress and signed into law by US President Donald Trump will end the diversity visa programme and reduce the overall immigration levels from currently averaging 1.05 million to 2,60,000 a year.

A visa gives you the right to present yourself at the border or port of entry and seek entry to the United States. (Ultimately, the U.S. Customs and Border Protection officer at the border or airport makes the final decision whether to allow you into the country. Nonetheless, having the visa is normally a good sign that you'll be allowed to enter. Physically, a visa usually appears as a stamp in your passport.

When you receive instructions to go to a US consulate to pick up your visa, it means that you will be getting this stamp or an equivalent document that allows you to enter the United States. “Green card” is a slang term. In the narrowest usage, it is the plastic photo identification card that you receive when you become a US lawful permanent resident. Some visas lead to green cards – others don't, according to www.nolo.com.  

For a Green Card, you must be eligible under one of the categories at https://www.uscis.gov/greencard/eligibility-categories.

Green cards got their nickname because they were green in color from 1946 to 1964. In 2010 they became green again, but the nickname persisted during the intervening decades of blue, pink and yellow "green cards." Permanent residents who are 18 or older are required to carry their green cards at all times or face a fine or jail time. The cards expire after 10 years and must be renewed, except for those issued from 1977 to 1989, which never expire. Conditional permanent residents, who obtain legal status through a recent marriage or investment, must renew their green cards after two years, writes Investopedia.com.