A logo design featuring the letters "D" and "A" together, can be a monogram logo. This type of logo design is often used by companies or organizations that want to combine their initials to create a strong, recognizable brand. The letters "D" and "A" can be stylized or in a more traditional font, and can be arranged in different ways such as side by side, one on top of the other, or overlapping. The overall design can be simple or more complex, depending on the designer's style. This type of logo design can be used for businesses or organizations across various sectors, it's not specific to any industry.