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It features sandboxing techniques to protect systems from PDF-based attacks and allows users to add passwords to prevent unauthorized copying or editing.

acrobat xi standard crashes when opening multiple files | Community

Acrobat XI Standard is the software equivalent of a classic pickup truck. It isn't flashy. It doesn't have self-driving capabilities or a backup camera. But when you need to haul a load (i.e., edit a 200-page contract or merge 15 PDFs), it starts on the first try and gets the job done.

Disclaimer: Adobe has ended support for this product. For enterprise environments handling sensitive data, upgrading to a supported version (Acrobat Pro DC or Standard DC) is highly recommended for security compliance.