PDF/A is a PDF format that imposes certain restrictions on the essential parts of digital documents, including text, images, vector graphics, and related metadata, suitable for long-term storage. It is an ISO standard format and is now widely adopted in all industries. This PDF/A format guarantees that you can open your document, no matter what software you use, because essentially all the information needed to display the document and its elements in the same way is included in the file. In the digital age, it's important to have a reliable and secure format for storing and sharing electronic documents. PDF/A was created to meet this need, providing a standardized format for long-term storage and accessibility of digital documents. Whether you work in government, finance, law, or other industries, PDF/A is an important tool for preserving important digital documents for the future. There are many different types of PDF/A. Each of them has different PDF/A standards and conformance levels.