I remember encountering one of these PS/2s in my school's storage in the late 90s and was kind of thrown for a loop to see 2.88 printed on the blue eject button

I remember encountering one of these PS/2s in my school's storage in the late 90s and was kind of thrown for a loop to see 2.88 printed on the blue eject button. Until then I was unaware that standard existed and didn't understand why it hadn't take off, I assumed it was just another proprietary IBM standard that the market rejected.