Below are some information on cookies files for your reference.
1. About Cookie
A cookie is a small file of letters and numbers downloaded on to your computer when you access certain websites. Like virtual door keys, cookies unlock a computer's memory and allow a website to recognise users when they return to a site by opening doors to different content or services. A cookie itself does not contain information, but when it is read by a browser it can help a website improve the service delivered. To protect your privacy, your browser only gives a website access to the cookies it has already sent to you.
Cookies remember the type of browser you use and which additional browser software you have installed. They also remember your preferences, such as language and region, which remain as your default settings when you revisit the website. Cookies also allow you to rate pages and fill in comment forms.
2. Types of Cookies
Cookies that PLI use are as below:
Session Cookies are temporary cookie files that reset after you close your browser. The website will not recognise you when you restart your browser and go back to the site that created the cookie. Session cookies will store your browsing information and are active only when you open the site until leave the site and close your browser.
We use persistent cookies, which is also known as stored cookies which is a file that is stored on your hard drive when you visit this site. The cookie would remain on your hard drive until it reaches expiration date. This cookie is able to indicate how you initially came to this website and for that reason it is also sometimes referred to as a tracking cookie.