Most international visitors need either a US B-1 business visitor visa or an approved ESTA under the Visa Waiver Program. B-1 visas require an online DS-160 application plus a consular interview; the published MRV fee is USD 185 and appointment waits can run from a few weeks to several months depending on the consulate, so apply at least 3 months before travel. Travellers from Visa Waiver Program countries can instead apply through ESTA for USD 21 and should do so at least 72 hours before departure. Bring a printed invitation or registration confirmation from the ASI Show, proof of hotel booking and a return ticket for the border interview. Business visitors may not take paid employment in the US; ATA Carnets are accepted for display samples and booth materials, which lets you bring product in duty-free and take it out again. Applications and full country lists are on the US Department of State travel site.
Estimated cost: Not yet confirmed
Processing: Varies by nationality; apply several weeks before travel.