How can I resolve the Aadhar AUA license has expired error?

You can convert a text file to CSV using a spreadsheet program like Microsoft Excel or Google Sheets, an online conversion tool, or a programming language like Python. The best method depends on the size of your file and your technical skills.

Converting a PSD (Photoshop) file to HTML is a manual process that involves recreating the visual design in code rather than using a simple automated conversion tool. Automated converters often produce messy, bloated code that is difficult to maintain and optimize. The best method is to hand-code the HTML, CSS, and JavaScript, using the PSD as a guide.
The manual PSD to HTML conversion process

• Analyze and slice the PSD 
• Structure your project
• Write the HTML markup
• Style with CSS
• Add responsiveness
• Add interactivity with JavaScript
• Test and deploy

To learn SAP software you should:

• Understand the basics of SAP.
• Choose a SAP module (like FICO, MM or HR).
• Start practicing with online tutorials, youtube videos and SAP’s official learning hub.
• Expand learning with other platforms.
• Get certified and stay connected.

Open source software refers to a computer software whose source code is available for anyone to use, modify and share.

Adopting and implementing Software as a Service (SaaS) involves first performing a thorough needs assessment, creating a detailed implementation plan, securing stakeholder buy-in, and selecting the right SaaS vendor. Then, you need to integrate the SaaS into your workflow by configuring it, training users, ensuring data security and privacy, and establishing ongoing monitoring for performance and value.