What are default directories in the TYPO3 installation?

Following list is of the default directories in TYPO3 installation:

• File admin/ :In this directory, clients can store documents. Regularly pictures, PDFs or HTML documents which appear in this directories as well as its subdirectories.
• typo3/ :This directory consists of the majority of the documents accompanying the TYPO3 Core. The files are organized legitimately in the distinctive system augmentations in the sysext/directory, as per the application area of the specific file.
• typo3temp/ :This directory is for temporary files. It consists of subdirectories for temporary files of expansions and TYPO3 parts.
• uploads/ :This directory extension can utilize the upload folder setting in ext_emconf.php to determine a subdirectory of uploads/for this extension.