What are the visa & residency requirements in Oman?

"To apply for a visa to Oman, travelers must submit a valid passport, a completed visa application form, and a passport-sized photograph. Depending on the type of visa, additional documents may be required. Once the application is approved, the visa will be issued and sent to the applicant. To apply for residency in Oman, applicants must submit a valid passport, a completed residency application form, and a passport-sized photograph. Depending on the type of residency, additional documents may be required. Once the application is approved, the residency permit will be issued and sent to the applicant," said another expat in Oman.