Definite, Indefinite +Zero Articles

Used with a silent "H" e.g. hour, honest

What type of article is used with countries? E.g. Canada, England

Countries in plural e.g. Netherlands, United States

to talk about musical instruments e.g. I play.......piano, guitar

Companies e.g. Facebook, Twitter, IKEA, Google

Used for initialism e.g. BBC, FBI, CIA

When the name of a country includes multiple areas or it has "republic" in the name?

Used for Acroynms e.g. NATO, NASA, LASER, SCUBA

With Numbers 100, 1,000, 1,000,000

National groups e.g. British, Swiss, Spanish

Rivers/plural mountain ranges /seas/oceans/island groups e.g. Rhine, Rocky Mountains, British Isles

Before vowel sounds e.g. (ʌ) Umbrella

Noun + Number e.g. Room 221, Platform 2

Before consonant sounds e.g. (ˌjuː) (yew) e.g. Uniform

Mountains & lakes e.g. Everest, Lake Constance

Religions e.g. Islam, Christianity

General ideas/abstract nouns e.g. love, hate, happiness, evil, danger