OS/2 Product Placement
Movies
Golden Eye

This movie was heavily sponsored by IBM, having references to IBM PCs and other products on the script.
Office Space

Office Space does not look like a product placement, it seems more like a coincidence since they needed computer related boxed on the department of the main character.
When the three of them discussing fractional pennies off interest. Approximate at minute 50 and 1h10m at the main character department, at the back shelf.
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At 50m aprox.
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At 1h10m aprox.
Events
IBM OS/2 Fiesta Bowl (1993–1995)
From 1993 to 1995 IBM sponsored the Fiesta Bowl American college football bowl game.