what is a non-immigrant visa in us
An L-1B visa is appropriate for non-immigrant workers who are being temporarily transferred to the United States based on their specialized knowledge of the company's techniques and methodologies. An L-1A visa is for managers or executives who either manage people or an essential function of the company.
Even though the H-1B visa is a non-immigrant visa, it is one of the few visa categories recognized as dual intent, meaning an H-1B holder can have legal immigration intent (apply for and obtain the green card) while still a holder of the visa.