J/SQL - Java Structured Query Language

JA - Jump Address

JAD - Joint Application Design

JAD - Joint Application Development

JAE - Jump if Above Or Equal

JANET - Joint Academic Network

JAR - Java Archive

JBE - Jump if Below or Equal

JBOD - Just a Bunch Of Disks

JC - Jump if Carry set

JCE - Java Cryptographic Extension

JCGIS - Jefferson County Geographic Information Systems

JCIN - Jefferson County Information Network

JCL - Job Control Language

JCMD - Jefferson County Mapping Department

JCN - Jittery Coding Nudnicks

JCOS - Jefferson County Open Space

JDBC - Java Data Base Connectivity

JDE - Java Development Environment

JDK - Java Developer Kit

JE - Jump if Equal

JEDEC - Joint Electron Device Engineering Council

JEIDA - Japanese Electronics Industry Development Association

JEPI - Joint Electronic Payment Initiative

JES - Job Entry System