Illustrator: Used for assembling large/small scale plans, renderings etc. Transforms images into high res vector graphics which are scalable.
Photoshop: Used for marketing graphics, renderings, illustrations, photo manipulations. Essential for any LA professional. Learn it.
InDesign: Used for multi-page, color documents such as HOA guidelines, arch guidelines, portfolios, pamphlets, brochures and layout design.
Acrobat Writer: Used for creating pdf’s of nearly everything. Essential for any firm.
LA firms use most if not all of these programs and more.