KGP Productions 

P.O. Box 37 

Kendall Park, NJ 08824-0037 

Voice: (800) 631-0062 

FAX: (908)422-0076

KGP Computer Show Web Page 

Ken Gordon Shows tend to be the largest shows in the area. 
These shows happen less frequently since they cover PA, NJ, and MA. 

Northern Computer Shows 

P.O. Box 556 

Bolton, MA 01740 

Voice: (508)744-8440

Northern Computer Shows Web Page 

These shows are a bit smaller than the KGP shows.
These shows happen more frequently and cover MA, NH, and ME. 
Most vendors are local. 
MA vendors don't charge tax at NH shows. 

Market Pro

P.O. Box 364

Ramsey, NJ 07446 

Voice: (201)825-2229

Market Pro Web Page 

I'm not certain that I've ever been to one of these shows.
The company seems to be national with only a few shows in this area.