1936
First programmable computer. The Z1 was created by German Konrad Zuse in his parents' living room between 1936 and 1938. It is considered to be the first electromechanical binary programmable computer, and the first really functional modern computer.
Answer:
The different variable in C is 21213316700.
Explanation:
Given value:
Total value = letters + underscore value
Total value = 52 + 1
Total value =53
choice for first character = 53 letters +10 digits
first character = 63
choice for remaining characters
So,
Variable number With one 1 character = 53
Variable number With 2 character = 53 × 63
Variable number With 3 character = 53 × 63²
Variable number With 4 character = 53 × 63³
.
.
.
Variable number With 7 character = 
Total difference variable = 53 + 53 × 63+ 53 × 63²+ 53 × 63³+....+ 
Total difference variable = 53(1 + 63 + 63²+ 63³+ .... +
)
Formula:

Total difference variable

ALTER TABLE customer ADD CONSTRAINT customer_number_unique UNIQUE (customer_number);
Ferruccio Lamborghini
He is the creator/inventor of the Lamborghini.
Answer:
Desktop icons include Computer, your personal folder, Network, the Recycle Bin, Internet Explorer, and Control Panel. 1. Right-click an empty area of the desktop, and then click Personalize.
To arrange icons by name, type, date, or size, right-click a blank area on the desktop, and then click Arrange Icons. Click the command that indicates how you want to arrange the icons (by Name, by Type, and so on).