A collection of 15 issues of the first hacker newsletter, the Youth International Party's (Yippies) phone hacking ("phreaking") newsletter, the Youth International Party Line (later renamed Technological American Party, or TAP). Also includes a hand written sheet on number 5 signalling systems.

Number 13 of the Youth International Party Line, published September-October 1972. This issue includes updated information on building a blue box, as well as a list of country codes and information on long distance dialling. Letters from readers include information on constructing 'red boxes', notes on the recording by the National Security Agency of trans-Atlantic phone calls, and using knockout boxes to trick the subway gates in New York.

The newsletter notes that information on the 'phirst international phone phreaking convention' was published in Ramparts Magazine and Telephony. There is also a reprint of an advertisement for Bell detailing the new phone system and the musical notes that correspond.

Volume number 4 of the Youth International Party Line, published September 1971. This issue is titled the 'special pay phone issue' and begins with an article on payphones work. There is also information on how to hack payphones, and letters from readers on payphone hacking tips.

The back of the newsletter has an article on what is called 'monkey warfare' and is described as using epoxy glue to fill in coin slots on payphones, parking metres, etc. Also of note is that this issue provides advice on how to reuse stamps by placing a stamp one inch lower on an envelope so that it does not become cancelled.

Number 22 of Technological American Party (formerly Youth International Party Line) published October 1973. There are schematics for building an 'answeroo' device that answers your phone before it rings, updated schematics for a red box, more information on the YIP's subject files exchange, an article by a telecommunications employee on how they catch people using red boxes, a reproduction of an article on Bell customers refusing to put stamps on their envelopes when they pay their bills, and an appeal from Abbie Hoffman to donate to a defence fund for his arrest for selling cocaine.

Letters from readers including information on phone company codes and numbers, toll restrictors, how phone lines works, that bank companies keep copies of cancelled cheques which could be viewed by government agencies, how to cheat a phone bug, and how to order informational videos and brochures from Bell.

A hand drawn document with information on a number 5 signalling system. A note on the bottom indicates that it was taken from Bell Laboratories in 1970.

Number 13 of the Youth International Party Line, published September-October 1972. This issue includes updated and amended country codes, red boxes, and reproduces what is allegedly a letter from AT&T indicating that they are trying to find information on people who have committed wire fraud based on information gleaned from the YIPL newsletter. Letters from readers include information on telephone numbers in San Francisco and Colorado, what telephone operators are learning, and recipes for using canned mackerel.

There is also more information on how to support "Captain Crunch" (alias of John Draper) as he goes to trial to face wire fraud charges.

Volume number 6 of the Youth International Party Line, published November 1971. The newsletter include a statement of purpose about the Youth International Part Line which states that the YIPL is meant to share reader information and create a centralized information pool of all things counter culture related, not just phone hacking. There is more information about using blue boxes, and how to mitigate issues you might encounter. Credit card codes are listed, as well as a diagram of how to make a mixer and amplifier.

Letters from readers include more tips on circumventing the phone company. Information on, and templates from, the War Tax Resistance are present in this issue again, as well as more tips on how to circumvent the postal service.

Also present is a photocopy of Page 2 of this issue.

Number 18 of the Youth International Party Line, published May 1973. This issue is titled "the sex change issue" and relays a letter from a reader asking YIPL to stop using "Ma Bell" as Bell Telephone is a system of the patriarchy, and instead to call is "Pa Bell". Articles include a continuation of an article from the previous issue on how Bell came to dominate the telecommunications industry, how to prevent long distance calls from being made on your phone line, information on inflation, an update on credit card fraud checks, and information on the credit card numbers of the Bureau of Indian Affairs and how they are treating Indigenous peoples. There is also an article written by Abbie Hoffman on the importance of free speech.

Letters from readers include an appeal to help stop the 'Special Treatment and Rehabilitation Training' program at the U.S. Medical Centre (United States Medical Center for Federal Prisoners), information on loop lines, and using Mexican pesos instead of American coins in payphones.

Number 10 of the Youth International Party Line, published May 1972. This issue includes information on how to start your own local chapter of YIP, as well as how to create a 'Peoples Yellow Pages' in your own community. Letters from readers include tips on how to get free phone calls, phone campaigns regarding the Vietnam War, and how to change stop lights. There is a clarification on the article from the previous issue on how to make free long distance calls, and a note on a computer system that has been set up in California to prevent fraudulent credit card calls.

Number 17 of the Youth International Party Line, published March-April 1973. Articles include advice on how not to get arrest for phone phreaking, a retrospective review of NY Times articles showing how Bell has caused telecommunications rates to rise, more information on creating and refining a red box, and how to build a line relay. Letters from readers include advice on making ten cent phone calls for only five cents, how to make long distance calls for free, phone company numbers, loop lines, and how to make slugs out of pennies and ice.

Number 9 of the Youth International Party Line, published March-April 1972. The main article is on how to receive long distance calls at no charge to the caller, complete with a diagram. There are also a number of letters from readers on topics such as punch card hacking, payphones to use in Atlanta, and tips to read articles on the advertising campaigns of ITT, and bugging and de-bugging devices. The final page has information on a new telephone building being built in New York City, and on what type of headsets phone operators wear.

Number 11 of the Youth International Party Line, published June-July 1972. This issue is advertised as a 'special convention issue' to coincide with the first phone phreaking conference being held in Miami Beach, July 11-12, 1972. The convention is promised to include teach-ins on telephones, meetings with internationally known phone phreaks, courses on phone politics and peoples technology, and information booths and demonstrations on anti-war, women's rights, health care and more.

Letters in this issue advertise a correspondence course on making your own clandestine devices, and tricks for getting money/refunds from the phone company. This issue also includes a new article on receiving free long distance calls along with a diagram. There is also a call for a boycott of companies that make defence tools and weapons being used in South East Asia. Finally, there is a call for contributions to a defence fund for 'captain crunch' the pseudonym of John Draper, noted phone phreaker, who had been arrested for using a blue box.

First issue of the Youth International Party Line, published June 1972. The issue indicates that the Youth International Party held a protest on Mayday of the same year and handed out 10,000 flyers for the publication. The YIP cites their disappointment in 'Amerika' as a reason to publish this newsletter to help people understand and dismantle the telecommunications monopoly of the Bell Telephone Company. They ask readers to share their copy of the newsletter with friends, and to donate money if possible, or envelopes, paper and stamps from their workplaces. They also make note of a probable need to set up a bail fund.

The first article teaches how to fake credit card charges for long distance phone calls, by using the credit card code for a major company. There is also an article about how to illegally hook up an extra phone to your phone line. There are letters to the editor that ask about topics such as new payphones in Washington, D.C. no longer being able to be fooled by the sound of change in a payphone, and a movement asking people to cancel their phone lines in protest of the Vietnam War. There is a template from the War Tax Resistance to indicate to the government that you will not pay phone taxes that go to fund the war, and information on WPAX a radio station broadcasting to troops in Vietnam.

Issue number 2 of the Youth International Party Line, published July 1971. The main article is on blue boxes being used for phone hacking, and how to do so. There is a reprint of an article by journalist Russell Baker addressed to Abbie Hoffman, along with a reply from Hoffman, about the Bell Telephone monopoly.

There are letters from readers inquiring about how to detect if your phone has been wiretapped, as well as listing the phone numbers of prominent politicians with a note to call them collect from a pay phone. The back of the newsletter has information on how Bell has become what the YIP calls 'anti-human'. The two incidents include tapping the phone of Senator Eugene McCarthy, and the fact that Western Electric (who made telephones), also made guided missiles.

Number 16 of the Youth International Party Line, published February 1973. The bulk of this issue is devoted to information on creating your own red box. There are also short articles on changes to credit card security, a description of a robocalling device, an appeal for telephone operators to provide insider information, and a reprint of an article about Salvador Allende accusing the International Telephone & Telegraphy Company (ITT) of attempting to bring about civil war in Chile.

Letters from readers including information on the T network described in the previous issue, using tape recorders for social change, and how to cheat tray-type change machines.

Number 14 of the Youth International Party Line, published December 1972-January 1973. The front page of this issue is devoted to a history and explanation of the newsletter itself, written by "Al Bell". Inside there is information on black boxes and how to use them to get around message units, how to build a "T network", telephone decoders, new credit card codes for 1973, an update on the "Captain Crunch" wire fraud case, and a reproduction of an article on phone hacking in England. Letters from readers include tips on reference guides, how to use KP2 for long distance calling, black box use, and debate on whether Bell is recording incoming calls to try to detect phone hacking activity. There is also an appeal for readers to send plans, information, printed materials of their own creation, and the YIPL will send them back the same from other readers.

Number 12 of the Youth International Party Line, published August 1972. This issue starts out with a note to new readers explaining what the newsletter is. There is also a note on the July 29th phone phreaking conference in New York and on the trial of John Draper for wire fraud. The bulk of the newsletter is devoted to a how-to on making a blue box. Letters from readers discuss how to bypass 'dial-locks', and a request for information on 'curdler' resonator tubes allegedly used by police on protestors.