The office responsible for managing government personnel resources in line with presidential directions is termed as:

The office responsible for managing government personnel resources in line with presidential directions is termed Personal management. This field, often referred to as Human Resources (HR) in the private sector, specifically deals with the administrative functions related to an organization's workforce. In a governmental context, personnel management encompasses recruitment, selection, training, compensation, performance appraisal, and employee relations for civil servants, all while adhering to the directives and policies set by the executive branch, such as presidential directions. Public administration is a much broader field encompassing the entire management and implementation of government policies and programs, of which personnel management is a component. While an 'HR Department' is the modern term for such a unit, 'Personal management' specifically describes the function and discipline, especially in historical or governmental contexts. Therefore, 'Personal management' accurately identifies the specific function described.