The owner of a product without an instruction manual can search for the manual online by visiting the product page and searching there, sending an email to the product company with her request or typing the name of the product into a search engine with "Manual" added to the end.
The best way to search for an instruction manual online is to type in the specific brand name and model number of the device being used. This typically brings up the manual in the first page of results. Add the word "Manual" to the product's brand name and model number if searching by brand name and model number alone does not produce results. In the event that finding the manual continues to be difficult, adding "Filetype: pdf" to the name and model number may help.
Products that are complicated to use often have an online instruction manual that can be accessed through the product brand's website. This manual is often a PDF that can be downloaded for free. Some software programs require the searcher to pay a fee to access the instruction manual. Most hardware products do not. An individual can also send an email to the company to request the manual if the manual can't be found on the company's website.