Machine-based eDiscovery review is becoming an inevitable reality due to the exponential growth of electronically stored information. Technologies like advanced search, machine learning, and predictive coding can help find more relevant documents than traditional keyword searches, but still do not find everything. Courts are recognizing these technologies and techniques in eDiscovery as the law in this area continues to unfold, guided by research from projects like TREC Legal Track. While machine assistance can help, human oversight remains important for legal review of electronically stored information in litigation.