While you’ve been packing your nerd pride T-shirts and selfie sticks, digging out your old slide rules, and taking your red jackets to the cleaner in preparation for this year’s Tech Reunions in June, we’ve been busy running the numbers for you on last year’s reunions. Do you need to know how many guests passed through Gray House (672), the number of light sticks given out at the Pops Encore party (350), or the precise quantity of giant brass rat paperweights bestowed upon 25th-reunion attendees (180)? Possibly not. But this is MIT. And we love numbers.