format each cell individually
Fluorine (F), element number 9
32
32
32
32
Databases use a table format, with Microsoft Access being one of the most widely used.
Your question is unclear. There is no main "HDD passcode" of any sort. There is usually a Master File Table (MFT) or a Master Boot Record (MBR) on most hard drives. There are utilities to clear those. If you would like to format your entire hard drive, you can use the Windows command line program "format" to clear your entire drive (and all of your programs and files as well). Please revise or clarify your question in the discussion page so that we can be of better assistance.
The superlative of efficient is "most efficient."
When you copy from somewhere else, the data most likely has a format in the original location. For many applications you can decide to bring that format with when you copy the data (keep source formatting) or apply formatting that exists at the destination (match destination table style).
A Sonicare Toothbrush is actually very efficient in cleaning your entire mouth. It can get in between your teeth to prevent gingivitis, and also makes it easier to clean the gums, which is where most people tend to ignore.
In the 15 multiplication table, the numbers that appear most frequently are the multiples of 15: 15, 30, 45, 60, 75, and so on. However, the number 15 itself is the first and smallest multiple, appearing as the first entry in the table. Since every multiple of 15 can be divided by 15, it is the most significant number that defines the entire table. Thus, 15 is the number that appears most frequently in its multiplication table.
The most efficient design would be a buffet style setup where all the food is placed next to each other to maximize space. This type of set up is usually done when entertaining a large number of guests.