This set of 4 floppy disks contains Microsoft Excel 4.0, a vintage software program developed by Microsoft. The disks are compatible with computers and laptops that have a 3.5\u201d floppy disk drive. The program is perfect for those who need a basic spreadsheet program for their personal or professional needs. The brand is Microsoft and the model is Microsoft Excel 4.0. The software falls under the categories of Computers/Tablets & Networking, Software, and Office & Business. Whether you are a collector or someone who needs the software for work, this set of disks is a great find.