From the publisher's website: "The full ORC ruleset plus a complete set of mundane modern day skills, jobs, equipment, advantages and disads." From the "What Is This" section:

Modern-ORC is made up of two parts:

Chapter One is the modern-world skills, careers, equipment, advantages and disadvantages found in In Dark Alleys minus all the supernatural-stuff. In other words, it’s all the stuff one would need to play a mundane, real-world, modern-day ORC game.

Chapter Two is Organic Rule Components, the ruleset found in all Vajra Enterprises Role Playing Games, including Fates Worse Than Death, Tibet and In Dark Alleys. ORC was designed specifically:

• To have every rule work from the same basic mechanic.
  
• For dramatic, character-centered, ultra-realistic play.
  
• To allow character classes that are realistically flexible.
  
• To allow scaled complexity (so if a PC wants to cook something it takes a simple roll, but if a PC is hacking a computer he or she has several strategies and possible modifiers).
  
• To have combat be realistically lethal and give players many real-life strategies.