Authentic portrait of Austrian mountaineer Peter Habeler, who made the first oxygenless ascent of Mount Everest in 1978 with Reinhold Messner.
AustriaPioneer of Oxygenless ClimbingFirst Ascender of Mount Everest Without Supplemental OxygenPioneer of Alpine Speed ClimbingUIAGM Mountain Guide & EducatorFirst Alpine Style Ascender of Gasherbrum I

Peter Habeler

Peter Habeler is an Austrian mountaineer and UIAGM mountain guide celebrated for shattering one of science's greatest dogmas. On May 8, 1978, he and Reinhold Messner made the historic first ascent of Mount Everest without supplemental oxygen. Habeler also revolutionized European speed alpinism with a record 10-hour sprint up the Eiger North Face in 1974.

🏔️
Summits Conquered
6 Peaks
🚩
Expeditions
1 Documented
🧗
Pioneer Routes
13 Established
📖
Chronicles
1 Stories
Editorially Verified
Historical Reference Record

Mountain Safety & Conditions Disclaimer: High-altitude climbing, glacial travel, and technical ascents entail severe objective risks including avalanches, serac collapses, rapid weather collapse, and altitude illness. Historical route descriptions and summit claims on Mountanity reflect documented archival sources and must not be used as live operational safety assessments. Local regulations, permits, and physical glacial topography change continuously.

Peer Review: Senior Editorial Board & Historical Reviewers • Editorial Standards

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Biographical Record & Archival Chronicle

Peter Habeler was born on July 22, 1942, in Mayrhofen in the Zillertal valley of Tyrol, Austria. Growing up surrounded by the towering glaciated peaks of the Zillertal Alps, Habeler began climbing at age six. By his late teens, he had developed exceptional physical stamina, rapid footwork on steep mixed terrain, and a profound intuitive understanding of mountain weather, qualifying as a certified Austrian state ski instructor and UIAGM mountain guide at age twenty-one.

In 1969, Habeler formed a legendary climbing partnership with South Tyrolean alpinist Reinhold Messner. Together, the duo pioneered extreme speed climbing in the Alps, discarding heavy bivouac equipment in favor of continuous, rapid movement. In 1974, Habeler and Messner stunned international climbing circles by climbing the fearsome 1,800-meter North Face of the Eiger (Heckmair Route) in an astonishing 10 hours—shattering the existing speed record by more than half and proving that speed and minimal gear dramatically reduced exposure to rockfall and objective hazards.

In 1975, Habeler and Messner exported their lightweight alpine philosophy to the Karakoram. Over three days in August, they climbed the Northwest Face of Gasherbrum I (Hidden Peak, 8,080m) in pure alpine style—carrying only small backpacks, using no supplemental oxygen, fixing zero ropes, and establishing no permanent camps. It marked the first time an 8,000-meter peak was climbed in pure alpine style, permanently transforming the ethics of high-altitude mountaineering.

Habeler's greatest historical breakthrough came in the spring of 1978 during the Austrian Everest Expedition led by Wolfgang Nairz. Disregarding universal medical warnings that climbing above 8,000 meters without supplemental oxygen would lead to fatal cerebral edema or irreversible neurological damage, Habeler and Messner pushed out from the South Col (7,980m) on May 8, 1978. Fighting extreme exhaustion, hyperventilating up to fifteen times per step, and battling gale-force winds, Habeler and Messner stood on the summit of Mount Everest (8,848.86m) at 1:15 PM. They had achieved what science considered physiologically impossible, opening the modern era of pure, unassisted high-altitude climbing.

Following Everest, Habeler authored the bestselling book 'Der einsame Sieg' (The Lonely Victory) and continued climbing high-altitude giants without supplemental oxygen, including Cho Oyu (8,188m), Nanga Parbat (8,126m), and Kangchenjunga (8,586m). He founded the Peter Habeler Ski and Mountaineering School in Mayrhofen, dedicating his career to mountain education and mentorship. In 2017, at the age of 74, Habeler returned to the Eiger North Face alongside his former student, the late prodigy David Lama, successfully climbing the 1,800-meter wall forty-three years after his record-setting ascent. Habeler remains an enduring icon of athletic grace, alpine ethics, and human physiological potential.

Notable Milestones & Ascents

  • First ascent of Mount Everest (8,848m) without supplemental oxygen alongside Reinhold Messner on May 8, 1978
  • First lightweight alpine-style ascent of an 8,000-meter peak: Gasherbrum I (8,080m) with Messner in 1975 without fixed ropes or oxygen
  • Set a historic 10-hour speed record on the direct North Face of the Eiger with Reinhold Messner (1974)
  • Summited Cho Oyu, Nanga Parbat, and Kangchenjunga in pure style without supplemental oxygen
  • Repeated the 1,800m North Face of the Eiger at age 74 in 2017 with protégé David Lama
  • Author of landmark high-altitude autobiography 'The Lonely Victory' (Der einsame Sieg)
  • Founder of the renowned Peter Habeler Ski and Mountaineering School in Mayrhofen
Verified Topographic Data

Key Statistics & Topographic Figures

Born
July 22, 1942

Mayrhofen, Zillertal, Austria

Everest Without Oxygen
May 8, 1978

With Reinhold Messner

Eiger Speed Record
10 Hours (1974)

North Face with Messner

First Alpine Style 8000er
Gasherbrum I (1975)

3-Day Push Without O2

Historical Evidence & First-Hand Accounts

Archival Primary Source Quotations

“Every breath was an agony of suffocation. But we knew that if we stopped moving, we would never stand up again.”

— Peter Habeler (1978)Source: The Lonely Victory
Domain Glossary & Definitions

Defined Alpine Terminology & Concepts

Oxygenless Ascent
Climbing into the extreme Death Zone above 8,000 meters relying solely on ambient atmospheric oxygen and natural respiratory hyperventilation.
Speed Alpinism
A lightweight climbing philosophy prioritizing rapid ascent to minimize exposure to objective hazards like rockfall, avalanches, and weather deterioration.
Citability & Knowledge Retrieval

Frequently Asked Questions: Peter Habeler

Who is Peter Habeler and what was his Everest breakthrough?

Peter Habeler (born 1942) is an Austrian mountaineer who, alongside Reinhold Messner on May 8, 1978, made the first ascent of Mount Everest without supplemental oxygen.

Why did scientists believe climbing Everest without oxygen was impossible?

Leading physiologists stated the atmospheric pressure at 8,848m was too low for human oxygen diffusion, predicting irreversible brain damage or rapid death without bottled oxygen.

What speed record did Peter Habeler set on the Eiger North Face?

In 1974, Habeler and Reinhold Messner climbed the 1,800m North Face of the Eiger in an astonishing 10 hours, cutting the existing speed record by more than half.

What 8,000m alpine-style breakthrough did Habeler achieve in 1975?

In August 1975, Habeler and Messner climbed Gasherbrum I (8,080m) in pure alpine style over three days without supplemental oxygen or fixed ropes—the first alpine-style 8000er ascent.

What classic book did Peter Habeler write about Everest?

Habeler authored the bestselling 1978 autobiography "Der einsame Sieg" (The Lonely Victory: 8,848 Metres Without Oxygen), detailing the physical agony of the climb.

Which other 8,000-meter peaks did Peter Habeler summit?

In addition to Everest and Gasherbrum I, Habeler summited Cho Oyu (8,188m), Nanga Parbat (8,126m), and Kangchenjunga (8,586m), all without supplemental oxygen.

At what age did Peter Habeler repeat the Eiger North Face?

In 2017, at the age of 74, Habeler successfully climbed the 1,800m North Face of the Eiger again, guided by his former student, the late prodigy David Lama.

Where is Peter Habeler from and what school did he found?

Habeler was born in Mayrhofen in the Zillertal, Austria, where he founded the renowned Peter Habeler Ski and Mountaineering School.

Associated Summits (6)

Snow-blown summit pyramid of Mount Everest towering above the Khumbu Glacier.
🚩 18 Expeditions
8,849 m
First Ascent: May 29, 1953🧗 3 Routes

Mount Everest

Mount Everest is the highest mountain above sea level on Earth, standing at an official elevation of 8,848.86 meters (29,031.7 ft). Straddling the international frontier between Nepal and China, it is known locally as Sagarmatha in Nepali ('Goddess of the Sky') and Chomolungma in Tibetan ('Mother Goddess of the World'). The peak rises into the extreme upper troposphere, where oxygen levels drop to barely one-third of sea-level pressure. Climbers face hurricane-force jet stream winds, severe frostbite conditions, shifting ice crevasses in the Khumbu Icefall, and the dangerous Death Zone above 8,000 meters.

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The towering north-face pyramid of Kangchenjunga rising above Pangpema.
🚩 3 Expeditions
8,586 m
First Ascent: May 25, 1955🧗 1 Route

Kangchenjunga

Kangchenjunga, at 8,586 meters (28,169 ft), is the third-highest mountain on Earth, rising on the border between Nepal and Sikkim, India. Honored as sacred by locals, early ascent teams respected local beliefs by stopping short of the actual highest crest. It features immense vertical relief and notorious storm cycles.

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The broad snow crest and northwest slopes of Cho Oyu seen from Tingri.
🚩 3 Expeditions
8,188 m
First Ascent: October 19, 1954🧗 1 Route

Cho Oyu

Cho Oyu, at 8,188 meters (26,864 ft), is the sixth-highest mountain in the world, situated 20 km west of Mount Everest. Meaning 'Turquoise Goddess' in Tibetan, it stands on the glaciated Nangpa La trade route between Nepal and Tibet. Its moderate northwest slopes make it the most accessible 8,000-meter peak.

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The immense glaciated wall of Nanga Parbat under clear alpine sky.
🚩 7 Expeditions
8,126 m
First Ascent: July 3, 1953🧗 4 Routes

Nanga Parbat

Nanga Parbat, at 8,126 meters (26,660 ft), is the ninth-highest mountain on Earth and the western anchor of the Himalayas in Pakistan. It boasts the Rupal Face, the highest vertical precipice in the world at 4,600 meters from valley floor to summit. Known for profound climbing history, highlighted by Hermann Buhl's legendary solo summit without supplemental oxygen in 1953.

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The rugged snow and rock ridges of Gasherbrum I (Hidden Peak).
🚩 5 Expeditions
8,068 m
First Ascent: July 5, 1958🧗 1 Route

Gasherbrum I

Gasherbrum I, at 8,068 meters (26,470 ft), is the eleventh-highest mountain in the world. Named 'Hidden Peak' by explorer William Martin Conway due to its concealment behind surrounding Karakoram giants, it stands on the border between Pakistan and China. The peak was first climbed in 1958 by an American team led by Nick Clinch, and in 1992 Nazir Sabir summited it with Rajab Shah and Mehrban Shah, marking his fourth Pakistani eight-thousander.

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The sheer 1,800-meter limestone amphitheater of the Eiger North Face in the Bernese Alps.
🚩 1 Expedition
3,967 m
First Ascent: August 11, 1858🧗 1 Route

Eiger

The Eiger, standing at 3,967 meters (13,015 ft) in the Bernese Alps of Switzerland, is globally renowned for its monstrous 1,800-meter (5,900 ft) sheer vertical North Face (the *Eiger-Nordwand*). Feared as the *Mordwand* ('Murder Wall') following catastrophic climbing tragedies in the 1930s, it remained the last great problem of the Alps until conquered in July 1938 by Anderl Heckmair, Ludwig Vörg, Heinrich Harrer, and Fritz Kasparek.

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Pioneered & Associated Routes (13)

Cho Oyu Northwest Face & Ridge (Normal Route) climbing route
🧗Standard / Normal Route
Alpine III, 35°-45° snow slopes, short 65° ice wall
+2,488 m

Cho Oyu Northwest Face & Ridge (Normal Route)

The Northwest Ridge is the standard and most climbed route on Cho Oyu, approached from the Tibetan plateau via the Gyabrag Glacier. First climbed in 1954 by an Austrian expedition, the route features relatively moderate snow slopes of 30 to 40 degrees, punctuated by a single prominent technical crux known as the Ice Cliff at 6,700m. Above Camp 3, climbers cross the Yellow Band and emerge onto a vast, gently rising summit plateau.

Difficulty: Moderate High-Altitude / Grade III, AD
Prime Window: Late April to May, September to October
Known Hazards: 4 major objective risks noted
View Detailed Topography
Eiger North Face (1938 Heckmair Route) climbing route
🧗Big Wall Alpine Mixed / Extreme North Face
UIAA V- rock, sustained 50°–65° hard black water-ice, extreme stonefall hazard
+1,800 m

Eiger North Face (1938 Heckmair Route)

The legendary 1,800-meter original route up the Eiger North Face (3,967m), first climbed between July 21 and 24, 1938, by Anderl Heckmair, Ludwig Vörg, Heinrich Harrer, and Fritz Kasparek. Negotiating an intricate, terrifying labyrinth of down-sloping limestone ledges, friable verglas, and hanging icefields, the route traverses the notorious Hinterstoisser Traverse, Swallow's Nest, the First and Second Icefields, the Death Bivouac, the Ramp, the Traverse of the Gods, and the sinister snowfield known as the White Spider before conquering the Exit Cracks to reach the summit.

Difficulty: Extreme Big-Wall Mixed / ED2, UIAA V-, 60° Ice
Prime Window: Late Winter to Early Spring (Modern) or July/August (Historical 1938)
Known Hazards: 4 major objective risks noted
View Detailed Topography
Mount Everest North Face (Hornbein Couloir Direct) climbing route
🧗Extreme Alpine Style Speed Blitz / Supercouloir
Sustained 50°–65° hard ice and neve in the couloir bottleneck, UIAA V mixed rock through the Yellow Band at 8,400–8,600m
+3,000 m

Mount Everest North Face (Hornbein Couloir Direct)

The North Face of Mount Everest via the Japanese Couloir and the sheer Hornbein Couloir is one of the most direct and formidable ice lines in the Himalayas. Rising 3,000 vertical meters from the Rongbuk Glacier to the summit, it funnels through a narrow 60-degree snow-and-ice cleft slicing straight through the Yellow Band and upper limestone cliffs of the North Face. In August 1986, Swiss alpinists Erhard Loretan and Jean Troillet executed one of the most audacious speed climbs in mountain history: climbing the entire face in a single 31-hour push at night without supplemental oxygen, tents, or fixed ropes. After summiting on August 30, they glissaded down the 3,000-meter face on their backs and buttocks in just 3.5 hours, completing the entire round trip in an astonishing 43 hours.

Difficulty: Extreme High-Altitude Speed / Grade VI, WI4+, 60° ice, UIAA V
Prime Window: Late summer / monsoon transition (August to early September) when ice bonds firmly to rock
Known Hazards: 4 major objective risks noted
View Detailed Topography
North Col & Northeast Ridge Route climbing route
🧗Historic Ridge & High-Altitude Mixed Traverse
UIAA IV rock slabs, 45°–55° ice, Yellow Band traverses, Second Step crux
+3,648 m

North Col & Northeast Ridge Route

The historic northern route on Mount Everest (8,848.86m), ascending from the Rongbuk and East Rongbuk glaciers to breach the icy wall of the North Col (7,020m). From the col, the route traverses the wind-blasted Northwest Ridge onto the North Face before joining the razor-like Northeast Ridge, navigating the notorious First, Second, and Third Steps in the Death Zone. This was the stage of George Mallory and Andrew Irvine's fateful 1924 climb and was first definitively surmounted on May 25, 1960, by Chinese climbers Wang Fuzhou, Qu Yinhua, and Gongbu.

Difficulty: Extremely Demanding / Grade V, Severe High-Altitude Technical Crux
Prime Window: Late April to Early June (Pre-Monsoon)
Known Hazards: 4 major objective risks noted
View Detailed Topography
Mount Everest Southwest Face (Bonington Route) climbing route
🧗Colossal High-Altitude Big Wall / Siege Route
5.9 rock and A2 aid climbing through the vertical Rock Band gully at 8,300m, sustained 50°–70° hard ice flutings
+2,300 m

Mount Everest Southwest Face (Bonington Route)

The Southwest Face of Mount Everest (8,848.86m) rises 2,300 vertical meters from the Western Cwm to the summit, presenting one of the largest and most forbidding rock and ice faces in the world. Dominated by the vertical 300-meter 'Rock Band' at 8,200–8,500 meters, the face repelled six international attempts between 1969 and 1974. In autumn 1975, a legendary British expedition led by Chris Bonington breached the face when Paul Braithwaite and Nick Estcourt unlocked the key ramp through the Rock Band. On September 24, 1975, Doug Scott and Dougal Haston climbed to the South Summit and pushed on to the main summit, becoming the first Britons to conquer Everest. Trapped by nightfall during their descent, they survived an epic open bivouac at 8,760 meters without oxygen, sleeping bags, or frostbite.

Difficulty: Extreme Technical Wall / Grade VI, 5.9, A2, 85° ice
Prime Window: Post-monsoon (September to October)
Known Hazards: 4 major objective risks noted
View Detailed Topography
Mount Everest Complete West Ridge (Yugoslav Direct) climbing route
🧗Direct Integral Ridge / Extreme Technical Alpine Line
Sustained Grade V+ rock climbing above 8,000m, knife-edge corniced granite ridges, 60° ice slopes
+2,822 m

Mount Everest Complete West Ridge (Yugoslav Direct)

The Complete West Ridge of Mount Everest is one of the most formidable and sustained technical routes on the mountain. Pioneered in spring 1979 by an elite Yugoslav expedition led by Tone Škarja, the route tackles the integral knife-edge crest directly from the Lho La col (6,026m) all the way to the 8,848.86m summit. Unlike the 1963 American West Ridge route which diverted into the Hornbein Couloir from the North Face, the Yugoslav line stayed strictly along the razor-edge crest of the West Ridge, surmounting technical rock buttresses up to Grade V+ at extreme altitude before traversing around the Yellow Band. On May 13, 1979, Andrej Štremfelj and Nejc Zaplotnik achieved the first ascent of the complete ridge, followed two days later by Stane Belak, Marjan Manfreda, and Ang Phu Sherpa in one of the greatest feats in Himalayan history.

Difficulty: Extreme Technical Alpine Ridge / Grade V+, UIAA V, 5.8, 65° mixed
Prime Window: Pre-monsoon (April to May)
Known Hazards: 4 major objective risks noted
View Detailed Topography
Northwest Face & Japanese Couloir (Normal Route) climbing route
🧗Standard / Normal Route
Alpine IV, 60° hard ice couloir, mixed rock scrambling
+2,968 m

Northwest Face & Japanese Couloir (Normal Route)

The Northwest Face via the Japanese Couloir is the standard and most frequently climbed line on Gasherbrum I (8,068m / Hidden Peak). Starting from the South Gasherbrum Glacier, climbers traverse the shared lower icefall into the Gasherbrum Cwm, then branch southward toward the forbidding northwest wall. The technical centerpiece is the Japanese Couloir—a sustained 50 to 60-degree gully of hard blue ice and shattered rock leading to the high col and summit slopes. First ascended in 1958 by Americans Pete Schoening and Andy Kauffman via the South Ridge, the Japanese Couloir line became the modern benchmark, climbed rapidly in 1992 by Nazir Sabir, Rajab Shah, and Mehrban Shah.

Difficulty: Extremely Demanding / Grade V, TD-
Prime Window: Late June to Early August
Known Hazards: 4 major objective risks noted
View Detailed Topography
Kangchenjunga Southwest Face (Normal Route) climbing route
🧗Standard / Normal Route
Alpine V, UIAA IV rock, 55° snow/ice
+3,111 m

Kangchenjunga Southwest Face (Normal Route)

The Southwest Face route is the classic line of ascent on Kangchenjunga, climbing out of the Yalung Glacier cirque in eastern Nepal. First forged in 1955 by British mountaineers Joe Brown and George Band, the route negotiates heavily broken glacial icefalls, ascends the vast hanging snow terrace of The Great Shelf, and threads steep rock gullies in the Sickle Couloir before reaching the delicate summit crest.

Difficulty: Extremely Demanding / Grade V, TD
Prime Window: April to Late May
Known Hazards: 4 major objective risks noted
View Detailed Topography
Kinshofer Route (Diamir Face) climbing route
🧗Standard / Normal Route
UIAA V+ on Kinshofer Wall, 65° blue ice
+3,926 m

Kinshofer Route (Diamir Face)

The Kinshofer Route is the standard climbing route up the Diamir Face on Nanga Parbat's western side. First climbed in 1962 by German mountaineer Toni Kinshofer and his teammates, it is famous for its early vertical crux, the Kinshofer Wall, which sits low on the mountain between Camp I and Camp II. Once past the wall, climbers face a massive glaciated amphitheater leading up into the freezing upper Bazhin Basin and summit shoulder.

Difficulty: Severe / Grade V+, TD
Prime Window: Mid-June to July
Known Hazards: 4 major objective risks noted
View Detailed Topography
Mazeno Ridge Complete Traverse climbing route
🧗Extreme High-Altitude Ridge Traverse
Grade VI, ED, 10-kilometre sustained traverse above 7,000m, Scottish IV mixed ice
+3,926 m

Mazeno Ridge Complete Traverse

The Mazeno Ridge of Nanga Parbat is widely considered the longest and most demanding high-altitude ridge on any eight-thousander, stretching an unbelievable 10 kilometres in length and traversing eight subsidiary peaks exceeding 7,000 metres before meeting the final summit pyramid. Long dubbed the last great problem of the Western Himalaya, it defeated numerous elite expeditions over three decades until British veterans Sandy Allan and Rick Allen completed the first full integral traverse and summit push in pure alpine style over eighteen heroic days in July 2012.

Difficulty: Extremely Severe / Grade VI, ED, 10km crest, 5.8, Scottish IV
Prime Window: Late June to mid-July
Known Hazards: 4 major objective risks noted
View Detailed Topography
Central Pillar of the Rupal Face Direct climbing route
🧗Direct Alpine Big-Wall Route
Grade VI, M5 X, 5.9, WI4, 4,100m vertical face
+4,126 m

Central Pillar of the Rupal Face Direct

The Central Pillar of the Rupal Face on Nanga Parbat is the greatest vertical mountain wall on Earth, rising an astounding 4,100 metres from the Rupal Valley floor to the 8,126-metre summit. First attempted over decades, it was conquered in pure, lightweight alpine style between September 1 and 8, 2005, by American alpinists Steve House and Vince Anderson without fixed ropes, high camps, or supplemental oxygen, earning them the prestigious Piolet d'Or.

Difficulty: Extremely Severe / Grade VI, M5 X, 5.9, WI4
Prime Window: Late August to mid-September
Known Hazards: 4 major objective risks noted
View Detailed Topography
Rakhiot Flank & East Ridge (Original 1953 Route) climbing route
🧗Historic Ridge Traverse & High Plateau
UIAA IV rock, 50°–55° ice and heavily fractured seracs
+4,150 m

Rakhiot Flank & East Ridge (Original 1953 Route)

The historic original route on Nanga Parbat (8,126m), ascending from the Rakhiot Glacier over the heavily crevassed Rakhiot Icefall to reach the colossal Silbersattel (Silver Saddle) at 7,450 meters. From the saddle, the route traverses an immense high snow plateau for over three kilometers before negotiating the Bazhin Gap and climbing steep mixed rock ribs up the summit pyramid. Immortalized by Hermann Buhl's epic 41-hour solo summit without supplemental oxygen in July 1953.

Difficulty: Extreme High-Altitude Endurance / Grade IV, 55° Ice
Prime Window: Late June to Early August
Known Hazards: 4 major objective risks noted
View Detailed Topography
South Col & Southeast Ridge (Normal Route) climbing route
🧗Standard / Normal Route
Alpine V, Scottish II snow/ice, 45° to 50° sustained terrain
+3,485 m

South Col & Southeast Ridge (Normal Route)

The South Col Route along the Southeast Ridge is the historic path of the 1953 first ascent and the most popular route on Mount Everest. Starting from Base Camp on the Khumbu Glacier in Nepal, climbers navigate the shifting seracs of the Khumbu Icefall into the Western Cwm. The route then scales the icy 45-degree slope of the Lhotse Face to the South Col at 7,925 meters, launching the final summit bid through the Balcony, South Summit, and Hillary Step to the summit of Earth at 8,848.86 meters.

Difficulty: Extremely Demanding / Grade V, AD+
Prime Window: Late April to Late May (Spring Pre-Monsoon)
Known Hazards: 4 major objective risks noted
View Detailed Topography

Documented Expeditions (1)

Associated Chronicles & Stories (1)

Documented Sources & Archival Citations

  • The Lonely Victory: 8,848 Metres Without Oxygen(Peter Habeler / Macdonald and Jane's)

    Supporting claim: Autobiographical account of the physical, psychological, and physiological reality of the 1978 Everest climb

    Accessed/Documented: 1979
  • Everest: Expedition to the Ultimate(Reinhold Messner / Kaye & Ward)

    Supporting claim: Corroborating chronicle of the Messner-Habeler oxygenless ascent and medical testing

    Accessed/Documented: 1979