In the 1930s, the earliest digital logic systems were constructed from telephone relays because these were inexpensive and relatively reliable.
1930 के दशक में, प्रारंभिक डिजिटल लॉजिक सिस्टम, टेलीफोन रिले से बनाए जाते थे क्योंकि ये सस्ते और अपेक्षाकृत विश्वसनीय थे।