: Indicates it was designed to fit on a standard 4.7GB single-layer DVD.

How to install Windows or Office 2016 & older versions for PC

The file sw_dvd5_office_professional_plus_2013_w32_english_mlf_x18-55138.iso represents a very specific, enterprise-targeted snapshot of Microsoft Office history. It is a robust, 32-bit, Volume License installation medium for Windows 7–10, best suited for offline environments, legacy hardware, or corporate KMS-managed deployments.

The file is a specific digital disk image for the 32-bit version of Microsoft Office Professional Plus 2013 . This particular build is part of the Volume Licensing channel, often distributed through the Microsoft Volume Licensing Service Center (VLSC) for corporate and institutional use. Breakdown of the Filename