Which website for filling US Visitor Visa form?

I have been invited to attend the scientific conference in U.S. This is not sponsored by my company and will be a personal trip.

This might appear less re-searched, but there are so many forum links, that appear in search result.

Please confirm the above two.

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How to Apply

Complete the Nonimmigrant Visa Electronic Application (DS-160) form.

Pay the visa application fee.

Schedule your appointment on this web page. You will need the following information in order to schedule your appointment: ...

Visit the U.S. Embassy or Consulate on the date and time of your visa interview.

Steps to Completing the DS-160:

Step 1: Determine the applicable visa category. ...

Step 2: Gather the required documents to complete the DS-160. ...

Step 3: Note the Application ID displayed on the Top Right-Hand Corner of the DS-160 Screen or Save the DS-160 to Your Computer.

Step 4: Complete the DS-160.

DS-160 Form Filling Instructions

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