The document summarizes the evolution of list fulfillment systems over four generations from manually intensive processes to more automated online systems. In the first generation, brokers would request counts from managers who would contact service bureaus. Counts were provided on paper and the process was error-prone. The second generation saw the introduction of the List Order Fulfillment System (LOFS) in 1976, which allowed online counts. However, disparities in service bureau technologies remained a challenge. The third generation saw some systems move online but capabilities were still limited. The fourth generation saw widespread adoption of online list fulfillment systems utilizing modern database technologies, allowing counts to be provided more quickly and easily.