Training melons and watermelons to grow vertically is referred to as trellising and is one of the advantages of growing melons in a high tunnel. Most melon cultivars and personal size (less than 7 pounds) watermelon cultivars are amenable to trellising.
A direct public offering (DPO), like the more traditional IPO, is a stock's introduction to the stock market. The stock is offered to the public for the first time. Unlike an IPO, which utilizes an underwriter to sell shares to the public, DPO shares are purchased directly from the issuing company.
In an IPO, the issuer obtains the assistance of an underwriting firm, which helps it determine what type of security to issue (common or preferred), the best offering price, and the time to bring it to market. Also referred to as a public offering. Investopedia explains Initial Public Offering (IPO).