It looks like you're offline.

Donate ♥

English (en)

Čeština (cs)
Deutsch (de)
English (en)
Español (es)
Français (fr)
हिंदी (hi)
Hrvatski (hr)
Italiano (it)
Português (pt)
Română (ro)
Sardu (sc)
తెలుగు (te)
Українська (uk)
中文 (zh)

My Books
Browse Menu

All

Log In
Sign Up

My Open Library
Log In Sign Up
Browse
Subjects
Trending
Library Explorer
Lists
Collections
K-12 Student Library
Book Talks
Random Book
Advanced Search
Contribute
Add a Book
Recent Community Edits
Resources
Help & Support
Developer Center
Librarians Portal

My Books
Browse Menu

Recent Changes

Books Edited |
Author Merges |
Work Merges |
Books Added |
Covers Added |
Lists

When	What	Who	Comment
September 5, 2010	Digital and Analog Communication Systems (6th Edition) - diff	113.193.156.63	Update covers

Open Library

Vision
Volunteer
Partner With Us
Careers
Blog
Terms of Service
Donate

Discover

Home
Books
Authors
Subjects
Collections
Advanced Search
Return to Top

Develop

Developer Center
API Documentation
Bulk Data Dumps
Writing Bots

Help

Help Center
Contact Us
Suggesting Edits
Add a Book
Release Notes

Change Website Language

Čeština (cs)
Deutsch (de)
English (en)
Español (es)
Français (fr)
हिंदी (hi)
Hrvatski (hr)
Italiano (it)
Português (pt)
Română (ro)
Sardu (sc)
తెలుగు (te)
Українська (uk)
中文 (zh)

Open Library is an initiative of the Internet Archive, a 501(c)(3) non-profit, building a digital library of Internet sites and other cultural artifacts in digital form. Other projects include the Wayback Machine, archive.org and archive-it.org

version 430f20c