5542, Aspire 5538, Aspire 5535, Aspire 5534, Aspire 5532, Aspire 5517, and Aspire 5515. Furthermore, Aspire 5740 is not the direct successor of any previous Acer products, but can be considered a technological upgrade of Aspire 5739. Although it was not developed as a back-to-back product, the Aspire 5810 Timeline was